Logitech M325s mouse Travel Ambidextrous RF Wireless Optical 1000 DPI2. 4 GHz, 5 buttons, AA, 57 x 94. 7 x 39. 1 mm, 93 g SMALL BUT MIGHTY Get work done anywhere with this small portable mouse. The size of M325S makes it great for users with smaller handsincluding kidsor limited workspaces. The micro precise scrolling and tilt wheel provide you the speed and accuracy you need. Easy to use and compatible with all of the main OS, its ready to work in seconds and lasts up to 18 months without changing batteries.