... 2.1~4CH video input 3.3G and GPS are available 4.CIF,HD1,D1 resolution Truck 3G ... and other data in the video.3,Built-in GPS,3G wireless communication module,which achieve global positioning and ... 4,It can be installed an external GPS tracker. Capturing images by GPS platform can reduce communication costs.5,H ... number in the video.This is the software of GPS tracker. You can see all the functions in this ...