Wireless Trackball M570 stays in one place so you don't have to move your arm to move your cursor. The sculpted shape supports your hand and lets you rest your arm. Scroll wheel moves up and down through Web pages and long documents. Design also features programmable buttons, back/forward buttons, and an adjustable laser sensor for a wide range of cursor speeds. Advanced 2.4 GHz wireless delivers reliable performance, effectively eliminating delays and dropouts (compared to conventional 2.4 GHz and 27 MHz wireless technologies). Trackball is automatically paired with the receiver plugged into your computer and minimizes conflicts with other devices. Control devices up to 30' away. The included Logitech Unifying receiver is a tiny, wireless receiver that stays in your laptop and lets you add up to six compatible devices. Battery life lasts 18 months. Trackball includes the required single AA battery and is compatible with a USB port, Windows XP, Vista, 7, Mac OS X 10.5 or later.
Trackball comfort: Sculpted shape supports your hand and stays in one place - move the cursor without moving your arm
Work and play anywhere: Get smooth, precise cursor control wherever you use your trackball - your desk, couch, even your bed
Logitech Unifying receiver: Connect up to six Unifying compatible devices with one tiny wireless receiver that stays in your laptop
Long battery life: Go for up to 18 months without changing the included AA battery* (*Battery life may vary based on user and computing conditions)
For Windows or Mac OS: Robust 2.4 GHz wireless connection lets you control your laptop, desktop computer or home theater PC wirelessly from up to 30 ft. away** (** Actual wireless range will vary with use, settings and environmental conditions)