This is something I have been looking for. I most shoot one-man-band style and monitoring video AND audio can be a chore. This has been a Godsend, especially with one my clients who is a motivational speaker. One moment he’s quiet and seconds later he’s yelling to draw attention. The 32bit float handles his hills and valleys perfecting. I set it to record, periodically check out the status from my phone (Bluetooth version) and sync in post. I love it. It will ALWAYS be in my kit.The item was first-class. Prime packaging. Immensely quick dispatch. Wish all sellers were this rad.Works great for recording non-amplified vocals.I use my F2-BT for live theatre, which can be whisper quiet or loud and belting; I have eight total.The newest firmware allows for formatting through the app.I like that I can set custom file names and add file notes through the app as well as set time/date automatically to sync with my phone’s clock.I wish I could connect more than one F2-BT to my phone app but that’s life.I saw some one dude here mention he had a hard time recording his motorcycle.The 32-but float doesn’t CLIP, but the small diaphragm of the lav mic can only do so much. If trying to record amplified sounds or anything more robust than vocals, try using a different mic.I tried recording a concert with the lav mic on my person while in the pit and while it never clipped, the diaphragm popped every time the bass drum hit with that bass E string.It would probably perform decently in that arena all the way back of house but that’s no fun as a guest.Anyhow. For the price, this is a great device. I also have Rode Wireless Go II that I like for other applications, mostly making a stereo capture of a room. Rode’s is good for people either with or without an attached lav mic but Rode doesn’t have locking input/output. Sadness. But I digress.If thinking about picking up an F2-BT, you’ll be content with your purchase.I also have a few F1 and an H5 that I use with SSH-6. SSH-6 with H5 is awesome. SSH-6 with F1 is good but you’ll get noise over headphone out if F1 is plugged in over USB to a power pack.This is a $200 piece of equipment that should be better built for that price range, especially if we're to believe the tech inside is as good as it says it is. I did a test recording and it seemed fine. I used the packaged in lav, it seemed more than good enough. The Float Recording is neater in post, but even with the lav mic you can experience the neatness of "float-bit recording". I was sitting, had the mic about a 14 inches from my mouth, then 10, 8, 2. 14-8 sounded the same, weirdly, 2 when I was practically eating the mic, it sounded terrible, I was hoping it would smooth it out. Though I guess that magic only happens after you normalise it in software.Pros:-Good sound-The app is ugly and looks like iphone 1 era, design wise, but it does work. Since there really isn't any actual LCD display on the unit itself. This makes the BT version seem almost a mandatory purchase since it at least gives you some visual information. Allows you to custom name tracks, turn on filters like "low-cut", change recording quality, etc. Whereas with the non-BT version, you're surrendering a lot to blind faith.-Small, a LOT smaller than I was expecting.-Connects well on Android. If you turn it off while in app and turn it back on while still in the app, it can take a while for them to see and re-pair with each other.Cons:-FRAGILE FEELING, the plastic doesn't feel robust. It has that type of "matte" near "satin" finish that scratches easily.-SD card bay is not male hands friendly. NORMALLY on devices like this they usually rely on a plastic door with a rubber semi-stretchy hinge. This has a rigid two stem and peg like hinge system. The slot itself is tiny, and is right next to the really stiff belt clip, making it hard to insert the card and remove it. This could easily have been avoided by just relocating the sd card slot to the side, so it wasn't competing with the belt clip.-Belt Clip, It's nice but not easily removable. Wished they stuck with the screw system they used on the F1 so you could remove it if you wanted to and easily put it back on.-Not really rugged. For something called "Field" you'd expect some kind of assurance. But even the SD card slot doesn't have an o-ring or any sort of rubber sealing. You can literally see a sliver of your SD card. The battery compartment isn't sealed either.NOTES:-When looking for this app look under "ZoomCorp" you'll have better luck finding it then.-128GB cards show 99:59:59 for record time in 32-bit float mode. So if you're looking for a card for this, probably realistically don't need more than a 128GB one.-When LOOKING for a card, MAKE SURE IT'S "V30" or greater grade. To ensure that it can write as fast as it can record, especially at that high of bandwidth. It records at 1536kb/s, in WAV files.Conclusion:I know, there are a lot of negatives with this device and they are all PHYSICAL related, It connects well. Is it worth it? Yeah, the tech its using is still rather new and to have it in a package this small and compact, totally. Though, with that said, I don't see much value in the non-BT version. The features that the app provide and requires BT to use, make the extra $50 worth it.Sounds great and works out of the box with little fussing with it. Only small thing is the wind screen is loose fitting, they send you 3 with it because you will loose themThis is a perfect item for almost any voice recording purpose. Yes, you need to sync the audio in post-production but well worth it for a worry-free setup for interviews and most definitely weddings. I strongly recommend spending the extra $50 for the Bluetooth version allowing you to check the recording process with the Zoom phone app while filming.The only thing to keep in mind is that this unit is really small and easy to drop and possibly break.The ability record 32-bit at this price point is like carrying around a mini zoom F6. Of course, you’re not unlocking superior sound quality with the included lav mic so upgrade if you can. Sure, there’s a plastic feel to it, but it is light and extremely mini, a welcome feature.It’s made so you don’t have to worry about audio levels, but there’s no practical way to monitor audio other than over the app or directly from an output jack on the device, so you’re trusting that you secured it on your talent properly to avoid any ruffling of cloths or strong wind conditions (occasionally).I would definitely opt for the B2 version to connect directly to your iOS device. You can adjust some settings, lock the mic, and view audio levels via Bluetooth connection. The option to connect to devices for timecode through the aforementioned connection is a huge plus.It’s a set it and forget it device, however not without some worry. Still, a worthwhile investment in 32-bit recordings, run and gun style, or solo shooting.I bought this primarily with the hope that I could use it for two things. As a back up for live events by passing the signal through this into a lav transmitter whilst also recording 32 bit float on the F2 and secondly as a basic field recorder of sorts for V/O work. I currently use a zoom H1 which is basic but does the job, albeit with a little bit of a noisy sound floor. I bought the bluetooth version so that I could control and monitor the unit remotely. In the end I sent the unit back. I wanted to love it but to be honest, either I had a faulty unit or was expecting too much of it.Here's the reasons I sent it back, in order of importance/annoyance:1. Incredibly quiet recordings. I'm not sure if this is just how 32 bit float works but with all of my mics, pro lavelliers, hyper cardioids, shotguns etc, the input level is being recorded so low that the sound bars on the app barely even appear, so there is no visual proof that you're getting anything at all. Also, screaming into the mic to get the sound bars to barely appear, only makes them do so briefly and after about ten seconds the bars drop to nothing even with the same volume of input and after this disappearance, no further loud noises make the sound bars reappear at all. To compensate for this quiet input I had to boost the output volume, via the app, as high as it could go to get a barely passable output from the headphone jack. This meant that the output that is then going from the headphone jack to the radio transmitter is so boosted that you begin to generate quite a bit of noise, sort of defeating the purpose of the F2 being a backup. It's not a backup if it's making the main source going to the camera unusable, when this happens the F2 then becomes your primary source and one you can hardly hear.When these quiet F2 audio recordings are brought into premiere pro, the waveforms are virtually a single line with no visible peaks and barely audible. On average I had to add 40db - 50db of gain to reach any sort of usable level. The miracle of 32 bit float is that these recordings were indeed usable but this does also of course boost the noise floor, maybe not as badly as lifting normal 24 bit audio but due to such hefty gain, the floor is lifted and were almost back to H1 levels of noise floor. The main problem with all this is that because the signal recorded into the F2 is so quiet, you can't really monitor background, unwanted noise like aircon or clothes rustling etc via the app or a radio transmitter and will only know what you're getting in terms of background noise once you come to the edit which is of course too late.With a juiced link xlr pre amp going into the F2 I was able to boost the incoming signal and this produced sound bars in the app I could actually use for monitoring and I must admit an earily silent, amazingly clean noise floor when bought into premiere. This was what I was expecting of 32 bit float. So could this work as a field recorder?2. It's monoThe isn't so much a failing as a limitation that I think makes this no replacement for a field recorder or even an H1 recorder or my cameras XLR's. Stereo mics plugged in produce a single mono recording and using a splitter cable or dual xlr pre amp for multiple speakers will again only produce a single, mixed down mono track so its uses are limited to single person interviews and Voice over work. Hmm.3.random recording fails.Several times a recording would simply stop with no warning at different points in a recording. Although it was possible to use the app to restart the recording remotely this random behaviour is too worrying for me to really rely on this for professional work. It happened about 5 percent of the time in my tests, with different mics, batteries, cards and in different scenarios. Mounted on a belt, lying on the desk etc. Thats 5 percent too often.4. Receiver interferenceI ran tests with seinheiser 2.4 GHz digital packs and G4 radio packs and with both got considerable interference when the transmitter units were touching the F2. So the idea of putting both units in a speakers pocket when using Lav mics is out. Again this adds problems to the chain when remote recording instead of providing safety and solutions. Another thing I found was that when trying to pass audio from the F2 headphone output to the seinheiser G4 lavs, the distortion and noise created was unusable, no matter what settings I used on the G4's. Either the audio being passed through was so quiet as to barely be audible or it was distorted by massive output gain. There was nowhere in between as if some kind of limiter or switch was being abruptly turned on or off..5. I tried to overlook the build quality but it is bad, in small, unnecessary ways that for a £200 recorder it shouldn't be. The sd card door is genuinely like something out of a Christmas cracker. It never closed properly after being opened the first time. I think it would be broken and lost in the first day of normal production and then there's nothing stopping your card from ejecting in some ones pocket, so to speak. Dont worry it won't come out of the unit though because it's almost impossible to remove from the unit without a pair of needle nose pliers. The battery door is likewise just not going to last. I'm not sure how this passed any kind of design stage. without any of the other issues I could overlook all of this but it just added to the sense that I was buying something that was a hindrance rather than a useful tool.6. The mark functionI had hoped that this mark function would allow for me to flag good takes in the recording and for these flags to pass through to my NLE to save me time in the edit but alas it seems that all they do is allow the zoom app to jump to these markers during playback which isn't quite so useful. I liked the app. It's basic but that's a good thing I think. I also liked that when using bluetooth and the app, the buttons on the unit don't do anything meaning the talent can't accidentally over ride your control.You can also quit the app and the unit will carry on recording if you've started a recording (unless it randomly stops of course!). Also being able to name files in the app is very handy to keep file names unique. A major issue is not being able to format the card without using a computer and a second piece of software. This will definitely be an issue on a shoot at some point, it's just going to happen that a card fails or fills up and you don't have a computer to format the card. Again this adds to what I have to worry about before and during a shoot rather than making my job easier.7. Because the SD card door and slot placement make removing the SD card almost impossible I thought no worries, I'll just transfer the files through the USB C port. No cable for this is provided, again this just feels like you're being short changed or disregarded by zoom, c'mon guys it's a cable, put one in the box, don't make me feel like a sucker for buying your product. I tested several, highly rated usb c cables and ports and the file transfer speeds were ridiculously slow. I mean 20 mins for a GB slow. SO again, using this recorder would slow down my process not speed it up and If you have to offload a card during a shoot, or live event this sort of crawl in 2021 just feels impractical and lazy on zoom's part.I wrote to zoom to ask for advice on all of this but as always with them, got no reply whatsoever. They're just not that kind of company. I wanted to hear from them before writing a bad review to see if I just had a bad unit, which may well be the case but my experience over the years is that they just don't do customer service which is a shame.I really wanted to like this recorder, it offers so much promise and either my unit was broken or I'm not fully understanding 32 bit float or the zoom F2's just not quite there yet as a product but in the end the conclusion I sadly came to was that using this would cost me £200 to get less security during remote recording, less flexibility as a field recorder and create more work in post production than the equipment I already use so I sent it back.If anyone can shed a light on some of the issues I had that would be really helpful and gratefully received.Having 32bit Float in such a tiny package with dual analogue to digital convertors is awesome. One ADC looks after the lower end the quieter sounds the other the very loud sounds when coupled seamlessly together you get a very wide dynamic range that can be recorded in 32bit float. This means you don't have to set gain levels as any sound that's too loud clipping or too quiet can be manually adjusted in post-production without raising the noise floor. The free software Audacity is 32bit Float compatible. Although it is very unlikely that you will clip your audio record on this device very loud sounds might exceed the sound pressure rating of your microphone causing audio distortion to be recorded. The microphone input can not be connected to a sound desk it is strictly microphone level only and cannot handle line-level input. The recorder takes a few seconds to load from boot-up be careful to monitor the record and that the red light stays illuminated once the record button is pressed. This is because if you accidentally double click the record button the device can display the record led as if recording and then after a short while stop recording. However, with the BT version of this device and the App for Android and IOS, you can control and monitor this device for peace of mind. The App will not allow you to format the SD card, download files to your phone, or directly listen to your recording via your phone. Audio files can be selected via the App and listened via the headphone jack on the Zoom F2-BT. In the non-Bluetooth version of this device, only the most recent recording can be played directly from the device. The issue of microphone caused popping noise due to a manufacturing defect has been addressed by Zoom. Any devices exhibiting this issue will be replaced by Zoom if you contact them. Audio files can be transferred using a USB to USB C cable (which isn't included) to a PC or Mac. You need to buy this cable so that the SD card can be formatted in the device using Zooms PC/Mac Software with the correct file structure and to change other system parameters such as date/time, low cut, Battery type etc. Finally, be gentle with the battery door and SD card slot door on this device. I do not work for Zoom I ordered my first Zoom F2-BT from Germany still on backorder so bought this second one from Amazon. I hope this helps but personally, I think the Zoom F2-BT is awesome and would highly recommend it.If your expectation is hit rec lock and leave it will serve you well and if the power is lost it won't kill your files either witch is nice you can just flick off to end a recording essentially the BT app is nice but not needed unless you want to add notes does what the tin says basically.Decided to test it with some combat style volt and roll doging cable held up no bending or snapping and switch didn't move yeah your not knocking it offline in the real world.App is called just "F2 Control" for reference.All files are output 001 002 naming etc notes are embedded with timecode/timestamps into the file and time can be set from a PC with a GPS time synced local clock if you so wish.The Included lav microphone is not good for thick duel layer clothes from my testing but if placed overtly or under a normal shirt layer it's great all around depending on your expectation.Locking threaded ports is nice but the stock lav cable makes it bulky best to use right angle for pocket use.There is a headphone output great for integrating into a wireless setup or using for monitoring you can set the fixed output level in the app.Personally the best mic before going for a countryman or something would be the Rode Smart lav+ witch is smaller and has quite a bit better pickup under thicker cotton/polyester fabrics in my experience.Getting it on the 5 mounth payments system allowed me to impluse buy but I had an event come up just 4 days after and it saved me audio feels as easy as digital photo post work almost if you place your microphone right of course.I bought the BlueTooth version for remote control (control is hard to use when the kit is in my back trouser pocket or inside my jacket). Frankly I can't hear any improvement against the audio off my iPhone 6 with a Rode Lav mic. And when reviewers' write that accessing the micro SD card is awkward - believe them! I also had trouble with the first USB cable I used with a MacBook; the card did not appear as a drive. Changed the cable (which otherwise works) problem went away. The build quality is nowhere near what I came to expect from my 5-year old Zoom H5.Worked perfectly right out of the box. Was worried that there might have been some issues with popping noises due to the mic connection as highlighted by many at launch, but my worries were unfoundedZoom seems to have rectified the issue and it works flawlessly now.I have both a dr-10l and zoom f2 that I use interchangeably, preferring the zoom f2 when in a less controlled environment (usually outdoor) due to its 32-bit float.