With SD card slot (SD card not included),Super Guard Advanced GPS Vehicle Security Device;No Contract, No Activation Fee, No Software use Fee * Band: 850/900/1800/1900Mhz; Network: GSM/GPRS * GPS Accuracy: 5m; Voice Surveillance; Alarm Function * Real Time tracking by internet (googlemap or software map) and GSM * Modes switch between "track" & "monitor";Check the vehicle state. This tracker is working Based on existing GSM/GPRS network and GPS satellites, this product can locate and monitor any remote targets by SMS or internet.