... Vehicle Alarm system,GSM and GPS tracking,radio frequency communication,voice control. Introduction,VAS is a ... technology of GSM and GPS tracking, radio frequency communication and voice control system. We are ... 3-5 meters; Connector, SMA - Remote control, Working frequency, 315Hz/433MHz. Code, 1527/2240 study code Working Voltage ... )(); Two way Car GPS tracker with Window Auto Closer Module ,GPS-1200