ProtoArc Wireless Trackball Mouse, EM04 Ergonomic Bluetooth Rollerball Mouse Rechargeable Computer Laptop Mouse Thumb Control Mice, Compatible with PC, iPad, Mac, Windows-Gray Ball - DE-EM04(Black)

• ERGONOMIC THUMB TRACKBALL: Equipped with a smooth trackball, move your cursor with your thumb movement instead of moving your wrist and arm. It will effectively reduce fatigue and strain for your wrist and arm. Not only work on flat surfaces, but also on your leg, sofa and other surfaces as well, especially on the narrow space, such as the messy desktop BLUETOOTH & 2.4G WIRELESS CONNECTION：PLUG and PLAY. This trackball mouse has triple connection modes. You can control three devices at the same time, switch freely between Android, tablet and Mac with just one button. Compatible with Windows, Android, Mac OS PC Laptop Desktop etc RECHARGEABLE & ADJUSTABLE DPI: The Bluetooth Trackball Mouse built-in 450mAh lithium battery. No need to change batteries. It can last 1 month per one full recharge. Please remember to turn it off if you do not use it for a long time. 5 DPI levels (200/400/800/1200/1600 DPI) allows you to change the cursor sensitivity easily for more precise tracking NOISELESS CLICKING: Smooth frosted surface and quiet clicks can bring a better user experience and free your worry about bothering others and keep you stay focused while working. Note: it will enter auto sleep mode if you don't use it for a few minutes to save battery and click it, the mouse will enter working mode again 6 BUTTON HIGH PERFORMANCE: ProtoArc bluetooth trackball mouse is designed with ergonomic and elegant curved shape. With the back and forward button, you can browse your website easily, make your work more efficient. Note: all the buttons are non-programmable and the back forward buttons are not compatible with Mac OS system