XCSOURCE TKSTAR TK906 Bicycle Taillight Real Time GPS Tracker GSM/GPRS Tracking Tool for Bike Motorcycle Wheelchair LD751 Working based on existing GSM/GPRS network and GPS satellites, this product can location and monitor any remote targets by SMS, APP and Internet. It adopts the most advanced technology of GPS and AGPS dual positioning. GPS and Location Based Service: Location Based service also named A-GPS, when tracker in underground or tunnel, can get location by AGPS. Real time tracking: Real time tracking it by cell phone and platform. Also can support get location every 5 seconds, and the GPS accuracy is 5m. Check the history of route on platform: Can check and replay within one year history of route of device, by web monitor center. Monitoring and communication: Can hear the voice around the tracker by cell phone. Also support communication with the tracker by cell phone (OEM).