4 Channel 1080P AHD real-time recording (CIF/HD1/D1/720P /1080P for selection)Support 4G Wifi remote monitor , real time monitor from IOS Android smartphone phone and PC.Built in GPS Module, Record GPS track and speed.This 4-channel car digital video recorder to assist you in recording driving route, license numbers, the situation that passengers get on or off the car and what happened when youre not in the car.Car digital video recorder is featured with diversified recording modes, compact size, easy installation, shock heat resistance and stable performance. A helpful comp for all car owners System: LINUXVideo input: 4 or 8 video inputs, aviation interface, 1.0Vp-p, 75Video output: 1 channel composite video output, aviation connector, 1.0Vp-p, 75Video standard: PAL system, NTSC systemImage compression: H264/H265Audio input: 4 audio inputsAudio output: 1 audio outputAudio coding: G711A/G726Recording method: simultaneous recording of audio and videoAudio bit rate: 8KB/sAlarm input: 4 IO alarm inputsAlarm output: 2 alarm outputs, output 12VRS485 interface: support 1 RS485 interface4G: EVDO/TD-SCDMA/WCDMA/TDD-LTE/FDD-LTEGPS/Beidou: support built-in GPS/Beidou module, geographic coordinates, speed, etc. can be written into the code stream and can be uploaded wirelesslyRemote monitoring platform: realize video preview, GPS upload, alarm upload, central command issuance, parameter configuration, etc. through wireless networkPower input: 10V-33VPower output: 12VWorking temperature: -20~ +70Material:Metal + plasticcolour:BlackPackage Contents:1 x Host4 x audio cable1 x Power cord1 x Remote control (without AAA battery)Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.