Sourcingbay Remote Control Mini Car Vehicle Realtime Tracker GPS103b for GSM Gprs GPS System Tracking Device With Remote Control;Super Guard Advanced GPS Vehicle Security Device;No Contract, No Activation Fee, No Software use Fee SMS/GPRS/internet network data transfer. Point-to-point, point to group, group-to-group monitoring. Support 9-36V, so it can be installed on Bus, taxi, truck ,personal car, business car etc. Remote control with alarm on/off function. GPS/GSM station positioning. This GPS trackers need to use a local sim card for 2G network, 850/900/1800/1900MHZ(sim card not included). Kindly notice: recently some sim card carrier have dropped 2G service, please confirm if your area can use 2g network sim card long time. Otherwise, please check the item description carefully before purchasing. thanks.