Simvalley GT-170 GPS Tracker - GPS Location with Google Maps, GSM Location, Geo-fence Use the GSM mobile network with our free Online Tracing Tool when no GPS signal is available Easy tracking with your mobile phone by text messages with a link to Google Maps Features include Geo-fencing, Sleep Mode, Quad-Band, Status Check, E-mail notification forwarding NO additional fees! Low operating costs from any SIM card using SMS Slim and compact design allows it to be easily hidden