I purchased the generic GPT-801 bluetooth GPS after being put-off by the high price of others. Basically the device works. It does everything a bluetooth GPS should do. The GPS charges via mini USB and uses standard Nokia cell phone batteries. Battery life is good at about 6 hours. This is a moot point because the device came with a car charger. So lets compare – 50 bucks got me the car charger, wall charger, pc charger, nokia battery, and the GPS. The other companies…up the creek!