... the car by SMS or telephone, remotely cut off power and gas supply. 1. Product OverviewF900GS is GPS/GSM/GPRS ... to obtain accurateposition data and utilizes its SIM300DZ / SIM900D GSM capability to send the position data to aspecified mobile ... tracking and fleet management.Applies to rental cars,business vehicles ,car ,logisticvehicles ,Taxis ,Construction Vehicles ,Law Enforcement Vehicles ,Coach , ...