Always know where you are with the miniature GPS receiver that fits on your keychain Powerful enough to work from your pocket or briefcase even whilst your keys are still in the ignition Connects by Bluetoothreg to all Bluetoothreg enabled mobile phones PDAs or netbooks Compatible with all known mapping software that can be downloaded to mobile phones Uses the MTK 51-channel GPS receiver Up to 10 hours use from one charge Charges via your computer or in the car in-car charger & USB (Universal Serial Bus) cable provided Measures just 46l x 32w x 14.7d mm & weighs only 22g Specifications GPS chipset MTKGPS channels 51GPS sensitivity-158d Bm Cold start 36 seconds Warm start 33 seconds Hot start 1 second GPS protocol NMEA-0813 V3.01 -GGA GSAGSV RMC Default DGPSWAASEGNOSMSASPower Built-in rechargeable Li-ion battery Bluetoothreg V1.2 compliant class II 10m range Operating temperature-10deg C to 60deg C Storage temperature-20deg C to 60deg C Charging temperature 0deg C to 45deg C