TM-270 2400 DPI Ergo RF Wireless MouseYour workday, but better Give yourself a headstart for the most productive workday yet with the Bayo II. Wireless, its easy to use anytime, anywhere; and offers an optimal 57 degree angle to put your arm in a natural position for more comfort and less strain. Two thumbs up Your workday should be made as simple as possible, which is why the Bayo II comes with two easily accessible thumb side buttons which enable you to easily navigate forward and back.