Basic 4CH SD Card Mobile DVR4-way audio and video input resolution D1/HD1/CIF optional H.264 video compression, Linux operating system, dual-stream The digital watermarking functional Dual SD card storage, single card to support a maximum capacity of 32GB Built-in GPS module optional Dynamic detection 8 seconds delay the power data protection, prevent momentary power failure caused the loss of data and storage of file corruption Rich peripheral interfaces, such as: RS485, RS232, differential speed interface Car black box function, recording speed, position, momentum, acceleration, temperature, brake, reverse, turn, alarm and other important information. DC8V ~ 36V wide voltage power supply, the industry standard embedded design, metal aluminum casing, low power Operating temperature -25 to +85 degreesProduct Models:WP-BW1001-S1, WP-BW1001-S2, WP-BW1002-S1, WP-BW1002-S2 models available. Please contact for details.Application:Different vehicles: bus, car, train, metro, taxi, logistic vehicles, police car, industrial vehicle,military trucks, oil tanker, ambulance, etc. Other Information:If interested, welcome to contact Christina: sales035@wekomp.com or skype: christina-touch Thank you!