Ergonomic Wireless Trackball Mouse, 3 Device Connection (Bluetooth or 2.4G USB Receiver) Bluetooth Quiet Computer Mouse, 2*AAA Battery Thumb Laptop Mice with 5 Level DPI for PC/Laptop/Mac/Windows Blue

[Ergonomic Design] - Relaxed Hand and Arm, Precision-engineered, it reduces hand fatigue with thumb controls instead of wrist/arm movements. 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. ^^ [3 Devices Connection - BT1+BT2+ 2.4G ] - 33 feet / 10 meter wireless connection range. This wireless mouse connects via Bluetooth or the included 2.4G USB receiver, Supported by an Easy-Switch button. No need to re-pair for a seamless workflow.

Compatible with PC, Mac, laptops, tablets and so on. ^^ [2*AAA Triple A Battery Required] - Two AAA batteries are required and are not included. There is no built-in battery, allowing for longer product lifespan and eliminating concerns about built-in battery failure. New batteries can be replaced at any time. Utilizing AI-based design concepts, resulting in less damage and longer battery life. No charging required, convenient and portable.
Please note: You will need to purchase 2*AAA batteries yourself. ^^ [Silent Mouse with 5 Adjustable DPI] - Easy and quick with just one click to suit different tasks and ensure instant switching between precise or fast tracking modes, the mouse is equipped with 5 adjustable DPI levels. The DPI buttons can be easily switched between 100-200-400-800-1200 DPI to allow the cursor to move faster or slower. Our computer mouse reduces 90% noise, so you don't worry about disturbing others when you focus on work. ^^ [Saves Space Used on any Flat Surface] - Move your thumb to move the cursor and operate, its perfect for tight workspaces and busy desks. Not only work on flat surfaces but also your leg, sofa, bed, carpet and other surfaces as well. Smooth & Precise Tracking on Various Surfaces -- Its advanced sensors detect even the smallest movements of the trackball, translating them into accurate cursor movements on your screen. ^^ [30-Degree Tilt & Specially Designed for Larger Hands] - Ergonomic Wireless Trackball Mouse with dimensions of 5.5" 4.1" 2", for medium to large hand sizes. We recommend that you take 1-2 weeks to get used to it, as many users find that it will help reduce the pressure and pain on your wrist caused by long-term use of the mouse and improve comfort.