Always know where you are with the miniature GPS 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 Bluetooth to all Bluetooth enabled mobile phones Compatible with almost all known mapping software that can be downloaded to mobile phones Uses the world's latest and most powerful MTK 51-channel GPS receiver Up to 10 hours'' use from one charge Charges via your computer or in the car (in-car charger and USB cable provided) Measures just 46(l) x 32(w) x 14.7(d) mm and weighs only 22g More information about mapping software is available on www.mapping4mobiles.com