I'm using windows 7 x64, When installing the driver, it stops and give me an error

Answer: It is not support for windows 7 x64 so far.

RBT-2100 blinks the LED  " Bluetooth Status" and  " GPS Status" .

Answer: Please remove battery. system will auto reset when power lost. 

what type of battery I should buy for the RBT-3000?

Answer: Please contact with local retail, you'll get fully support for battery changing.