... . h.264 video camera security 2.GPS wifi 3G optional; 3.128GB sd max; 4CH DUAL SD CARD DVR With G-Sensor/ GPS optional ... SENSOR +GPS Product Size : Features: >> 4-way audio and video input resolution D1/HD1/CIF optional>> H.264 video compression, Linux ... Car black box function, recording speed, position, momentum, acceleration, temperature, brake, reverse, turn, alarm and other important information. >> ...