Nulea M501 Wireless Trackball Mouse, Rechargeable Ergonomic Mouse, Easy Thumb Control, Precise & Smooth Tracking, 3 Device Connection (Bluetooth or USB), Compatible for PC, Mac, Windows, Android | Rechargeable mouse with bluetooth USB receiver,3 device use,smooth tracking,compatible with PC Mac Windows

Ergonomic Design with Smooth Thumb Control: Move your cursor by the smooth trackball instead of moving your wrist and arm. Let the easy and smooth thumb control help you reduce your muscle stress. The optimal angle of the trackball mouse allows you to keep your palm in a natural position for all-day comfort.
Precise Tracking with Adjustable DPI: Nulea trackball mouse provides precise cursor movement for exceptional accuracy and control. With the smooth trackball, you can be more productive on the move on almost any surface, any workplace. Especially on the narrow space, such as the messy desktop, couch, bed, small writing board on a chair, etc.
True Wireless Freedom: Connect up to 3 devices by either bluetooth or USB dongle. Switch easily between them by the button on the bottom to improve your efficiency.[KINDLY REMINDER: The 2.4G USB receiver is stored at the bottom of the mouse.]