Diamond NVR504L-24/24P-4KS2 24-Channel 1.5U 24 PoE 4K & H.265 Pro Network Video Recorder without Hard Drive, Embedded Linux Operating System, Up to 12MP Resolution, 320Mbps Bandwidth, 2 HDMI/1 VGAKey FeaturesSmart H.265+/H.265/Smart H.264+/H.264/MJPEG/MPEG4 Codec DecodingMax 320Mbps Incoming BandwidthUp to 12Mp Resolution Preview & Playback2HDMI/VGA Simultaneous Video Output3D Intelligent Positioning with Dahua PTZ CameraBrand Dahua OEM and Comes with No Logo SpecificationsMain Processor: Embedded ProcessorOperating System: Embedded LinuxIP Camera Input: 24CHDisplay Split: 1st Screen: 1/4/8/9/16/25 2nd Screen: 1/4/8/9/16Audio In: 1Audio Out: 12 Way Audio: 1 Channel Input, 1 Channel Output, RCABit Rate: 16kbps~20Mbps for per channelRecording Mode: Manual, Schedule(Regular(Continuous), MD, Alarm), StopAlarm In: 16 ChannelAlarm Out: 6 ChannelVideo Detection: Motion Detection, MD Zones: 396, Video Loss and TamperingAlarm Relay Output: 6 ChannelPlayback Channels: 1/4/9/16Playback Search: Time/Calendar Search, Event (motion)Playback Function: Play, Pause, FF, FB; Digital zoomNetwork Interface: RJ-45 port (10/100/1000Mbps)PoE Ports: 24 ports (IEEE802.3af/at)Network Users: 128Mobile: iPhone, AndroidUSB: 3 ports (2 Rear USB3.0, 1 Front USB2.0)RS485: 1 portRS232: 1 portInternal HDD: 4 SATA III Ports, up to 8TB capacity for each HDDe-SATA: 1 eSATA portPower Supply: Single, AC 100~240V, 50/60 HzPower Consumption: <18WOperating Conditions: -10 ~+55°C / 10~90%RH / 86~106kpaDimensions: 1.5U, 17.3" x 16.2" x 3.0"Weight: 10.4 lb