DBPOWER&reg; USB2.0 Wireless Finger Handheld Mouse Mice Trackball Mouse for Laptop PC Wirelessly on the trackball mouse lets you work anywhere, coffee table place to display your favourite chair, there's a comfy bed or sofa. You'll have to you do not to the mouse. Space saving as well as removing Desktop mess, you can fill the ball with your thumb and click, no need to a mouse to move or move your arm, you will need to remove the cursor. Life is as simple and comfortable. Thumb controlled trackball helps you to navigate to Windows and are easy, no switch dongles back and forth, or via buttons to press on the web. Advanced 2.4 GHz for fast data transmission with no interference. High-performance 30 x Wireless Range with tiny USB 2.0 receiver compatible with WinXP, Vista, Win7, open SUSE Linux and Mac OS. Supports your both hands for easy to control all day long. You can use the with the left hand and the will give your painful wrist and the fingers take a break. Sleep Function to save battery life, this hand held radio is after 5 minutes of inactivity sleep and immediately wakes up the at the click click