... GSM / GPRS network and GPS satellite positioning system, which set multiple functions of security, positioning, monitoring surveillance, emergency alarms ... .g. No.113, Nantou guankou 2nd Rd, Nanshan, shenzhen, china.*If your target enters into underground parking lot or other ... disconnection alarm.*Low batttery alarm function*Check the vehicle status*Set up DOOR ALARM, ACC ALARM, SENSOR ALARM by ...