Gps car tracker gps303g tk303g acc working alarm no retail box used widely for vehicles and other moving objects tracking compact,elegant appearance, easy to hide,, and outdoor installation built-in gsm, gps antenna support gps and lbs (location based service) double tracking solution support sms / gprs / internet network data transmission support configures the settings remotely set multiple functions of security, tracking, monitoring surveillance, emergency alarms and management in its entirety hardware description: