... industrial connectors special for mobile dvr.l Built-in GPS, WIFI, G sensor, Gyro sensor optional.2 SD Card slots optional ... startingOutput2Ch alarm output, level signal.Communication PortRS232 for remote control, RJ45 10M/100M Ethernet port.GPS and G-Sensor, Gyro-sensorbuilt ... G-Sensor to induce the vehicle X, Y, Z axis3G,WIFI Wireless transmissionBuilt-in wireless module optional. Such as 3G EVDO ...