This is the Sanwa Supply wireless mouse 400-MAWBT203W. It's practically unused, having only been opened and tested for functionality. The supported features are as follows: The current lowest price on Kakaku.com as of October 22nd (Wednesday) is 4,680 yen. Color: White Power: Battery (500mAh) Connectivity: Wireless (2.4GHz) and Bluetooth, includes USB receiver, supports multi-pairing Sensor: Blue LED, supports DPI switching Number of buttons: 6 buttons, silent Wheel: Aluminum wheel, tilt wheel support, fast scrolling support Software: Button assignment possible with dedicated software --- Power...Rechargeable Connection type...Wireless (Bluetooth)