... anti-shock Description for 4CH HDD Car MDVR: The 4ch car MDVR is with 4ch video recording,It is designed ... 3G,GPS,G-sensor function, and 4ch car mdvr model is with dua SD card, the max SD capacity ... is up to 64GB totally. super wide power supply on DC 8 ... ~32v, suitable for different kind of brand cars,buses,ship,train,long vehicles. with high technology ...