Function : 1. 4-channel DVR: The drive recorder supports 4-channel video input and 4-channel audio input, and 1-channel composite video output and 1-channel audio output. 2. Characteristic: The digital video recorder supports license plate number, time and driving information overlay. The host can be turned on, off, and delayed. You can also add left turn, right turn and auto full screen display when reversing. 3. Switch door recording: You can also add the switch door recording function, and the video files are packed separately during the door opening process, which is convenient for viewing and higher efficiency. 4. Multiple protections: professional production, safer RCA head interface, voltage input 9 to 36V wide, and multiple protections such as overload protection, short circuit protection, reverse polarity protection. 5 . Wide Application: Mini MDVR can be widely used in school buses, buses, tankers, engineering vehicles, large trucks, ships, coaches, yachts and so on. 6. Specification: Item Type: Digital Video Recorder Material: ABSMetal; Remote control battery: 1pc button battery Video parameters of each channel: resolution 720x576 or 640x480, refresh rate 30 frames / second, peak value: 1Vp-P, impedance: 75Ω Video interface: 4 inputs (RCA interface), 1 output (RCA interface) Sound: 1 inch Operation screen mode: 2.4G remote control / IR remote control / Wired control: High level trigger Positive Mirror Selection: OFF ON Recording method: independent recording for each channel Default Boot Screen: The default Quad screen mode selected from the menu Picture mode: four photos, three photos, two photos, one photo Power consumption: Host operation: 2W Output power: none Rated Voltage: DC 12V / 24V Maximum voltage range: DC 9-36V Working temperature: 0 - 55 Camera input: 4 channels Operation method: remote control Power Loss Protection: Yes Video interface: RCA interface App: Suitable for school buses, buses, tank trucks, engineering vehicles, large trucks, boats, coaches, yachts, etc. How to use: 1. Connect the camera to MDVR 2. Connect MDVR to the monitor 3. Connect the power 4. Start recording Package List: 1 x video control box 1 x power cable 1 x signal line 1 x remote control 1 x Manual