Features: 1.Safe MDVR: Industrial grade design, more secure RCA head interface, 9 to 36V wide voltage input, overload protection, short circuit protection, reverse connection protection. 2.Features: Support for license plate numbers, time, driving information and other characters overlay. The host can be turned on, off and delayed. You can add left turn, right turn, and reverse auto full screen display. 3.Switch Door Recording: The switch door recording function can be added, and the video files are separately packaged during the opening process, convenient for viewing and higher efficiency. 4.Wide Application: The mini MDVR is extensively applicable to school buses, buses, tank trucks, engineering vehicles, large trucks, boats, coaches, yachts, etc. 5.H264 Compression Algorithm: Adopt H264 video compression algorithm, video takes up less space on the hard disk and Long storage time, Support 128G memory card (not included). 6.4 Channel MDVR: The vehicle recorder supports 4 channels of video input and 4 channels of audio input, and supports 1 composite video output and 1 audio output. Specification: Item Type: Mobile Digital Video Recorder Material: ABS + Metal Remote Control Battery: 1pc CR2025 button battery 3V (not included) Video Format: PAL/NTSC (automatic identification, note: the camera (not included) needs to be connected before power on, the default is PAL format) Video Parameters of Each Channel: Resolution: 1920x1080 or 720x576 Refresh Rate: 25 frames per second Peak Value: 1Vp-p Impedance: 75 Video Interface: 4 inputs (RCA interface, support CVBS and AHD720P, AHD1080P), 1 output (RCA interface, 720P AHD or CVBS) Video Recording: Memory card (less than or equal to 128G, not included), recording format is AVI, h.264 compression Audio: 1 in Operation Screen Mode: 2.4G remote control / infrared remote control / wire control: high level trigger Positive/Mirror Selection: OFF/ON Recording Mode: Independent recording for each channel Default Boot Screen: The default boot -shaped or H-shaped four-screen mode, selectable in the menu Picture mode: -shaped four-picture mode, H-type four-picture mode, picture-in-picture and single-picture full screen and other picture modes Host Operation Power Consumption: 2W Output Power: None Rated Voltage: DC 12V/24V Maximum Voltage Range: DC 9-36V Working Temperature: -20 to +65 Camera Input: 4 Channels Storage Function: Not Supported Operation Method: Remote Control Power Loss Protection: Yes Video Interface: RCA interface Application: For school buses, buses, tank trucks, engineering vehicles, large trucks, boats, coaches, yachts, etc.