ProtoArc EM01 EN Wireless Trackball Mouse, Ergonomic Bluetooth Rollerball Thumb Mouse Rechargeable Computer Laptop Mouse, Adjustable Angle & 3 Devices Connection for PC, Mac, Windows-Violet Ball

Ergonomic design for more comfort: Unique adjustable hinge allows you to adjust the trackball angle from 0 to 20 degrees according to your needs, ensuring a more natural, comfortable hand position for all-day comfort

Precise thumb mouse: ProtoArc trackball mouse provides accurate and smooth tracking, allowing easy navigation through documents and web pages. You no longer have to move your arm to move the cursor. Instead, your thumb will control the cursor. It effectively reduces fatigue and strain on your wrist and arm. More productive in the narrow space, such as the messy desktop, sofa, bed etc

Bluetooth & 2.4G wireless connection: PLUG and PLAY. This trackball mouse has triple connection modes. You can control three devices at the same time, with just one button freely switch between PC, laptop and iPad to improve your efficiency. Compatible with Windows, Android, Mac OS PC Laptop Desktop etc

Rechargeable and adjustable DPI: The built-in rechargeable lithium battery of the bluetooth Trackball Mouse is a built-in rechargeable lithiumNo need to change the batteries. Do not forget to turn it off if you do not use it for a long time. With 5 DPI levels (200/400/800/1200/1600), you can easily change cursor sensitivity and track more smoothly

Silent Click: Smooth matte surface and silent clicks can provide a better user experience and free your worries about harassing others and keep you focused while working. Note: The middle scroll wheel is not silent. All buttons are not programmable and the forward buttons are not compatible with Mac OS system