Wanna do PC based wireless datalogging, or control your robot thru bluetooth - this product is a must have, easy to connect and explore wireless connectivity with microcontroller like Basic Stamp, Arduino, 8051, PIC, Atmega.
This is a handy little Bluetooth USB mini-adapter . This adapter supports Bluetooth v2.0 class 1 and has a maximum distance of up to 100m. The adapter also includes an indicator LED.
This device does not include any drivers or software, however, you shouldn't need any as it supports the native Windows Bluetooth stack (Windows XP, Vista, 7). Plug it in and Windows should handle the rest.