... mounted case; 2.h.264 compression; 3.with 3G/GPS function; 4. 4 video input Here is the bus dvr's specification: ... EVDO) Optional built-in 3G (HSDPA / EVDO) moduleGPSSupport built-in GPS module, geographic coordinates, speed, etc. can write code stream, ... the file for analysiCMSThrough a wireless network for video preview,GPS upload,alarm and central command issued uploading,parameter configuration ...