Features: Acquisition: 32-channel parallel Capable of operating indoors and tracking signals down to -157dBm 2005 new technology Auto on-off function (patented) 10 to 12 hours of operating on full charged battery Easy to place, easy to use The HS-B02 is a total solution GPS receiver with Bluetooth wireless transmitting ability Design based on RFMD indoor high sensitivity (HS-B02) GPS architecture The HS-B02 is a new generation GPS We special design it with patented auto on-off function Once you place it in your car You do not need to care it again When you switch your car on, it is on automatically. When you switch your car off, it is off too We make it wireless different from what you Know before Furthermore, the easy-place has your HS-B02 stay still in your car noMatter how sharp you turn your car or how sudden you stop your car You can also easilyTake it away for outdoor use