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_x000D_ Material: ABS + Metal_x000D_ Remote Control Battery: 1pc CR2025 button battery 3V (not included)_x000D_ Video Format: PAL/NTSC (automatic identification, note: the camera (not included) needs to be connected before power on, the default is PAL format)_x000D_ Video Parameters of Each Channel: _x000D_ Resolution: 1920x1080 or 720x576_x000D_ Refresh Rate: 25 frames per second_x000D_ Peak Value: 1Vp-p_x000D_ Impedance: 75_x000D_ Video Interface: 4 inputs (RCA interface, support CVBS and AHD720P, AHD1080P), 1 output (RCA interface, 720P AHD or CVBS)_x000D_ Video Recording: Memory card (less than or equal to 128G, not included), recording format is AVI, h.264 compression_x000D_ Audio: 1 in_x000D_ Operation Screen Mode: 2.4G remote control / infrared remote control / wire control: high level trigger_x000D_ Positive/Mirror Selection: OFF/ON_x000D_ Recording Mode: Independent recording for each channel_x000D_ Default Boot Screen: The default boot -shaped or H-shaped four-screen mode, selectable in the menu_x000D_ Picture mode: -shaped four-picture mode, H-type four-picture mode, picture-in-picture and single-picture full screen and other picture modes_x000D_ Host Operation Power Consumption: 2W_x000D_ Output Power: None_x000D_ Rated Voltage: DC 12V/24V_x000D_ Maximum Voltage Range: DC 9-36V_x000D_ Working Temperature: -20 to +65_x000D_ Camera Input: 4 Channels_x000D_ Storage Function: Not Supported_x000D_ Operation Method: Remote Control_x000D_ Power Loss Protection: Yes_x000D_ Video Interface: RCA interface_x000D_ Application: For school buses, buses, tank trucks, engineering vehicles, large trucks, boats, coaches, yachts, etc.