... D1 Recording dvr * dual SD CARD for car * DC-9~60V,3G ,GPS,G-sensor Descritpion for 3G 4ch car DVR: ... 4CH car DVR PHOTOS: back view for 3G car DVR3G SD card car DVR spec.* Video compression: H. ... vehicle car DVR* 3G wireless on WCDMA, CDMA2000, TD-CDM,GPRS, functiondual SD card CAR DVR with 3G,GPS,G-SENSOR ... (according to quantity)welcome OEM and ODM. dual SD card 3G wireless H.264 4ch car DVR (ED-2103)