[(ERGONOMIC TRACKBALL DESIGN)] - Equipped with 40mm trackball and sensitive 3-dot positioning tech, precise thumb control to move the cursor, no need for frequent wrist movement. Technical 19deg tilt angle keeps your wrist and shoulder in natural lines and helps to reduce muscle stress, wrist pain, RSI, and carpal tunnel syndrome. Perfect for drawing, typing, working, playing, etc.
[(SILENT & DPI ADJUSTABLE)] - This Bluetooth track ball mouse supports 4 levels cursor movement speed: 600/800/1200/1600. Suit different tasks, ensuring accuracy & speed. Press the middle DPI button to change it faster or slower. Features noiseless click on left/right button, suitable for usage in quiet places like public occasions, libraries, meetings, cafeterias, or at night.
[(2 DEVICES CONNECTION)] - This ball mouse supports 2 Bluetooth modules, simultaneously connecting and switching between 2 devices. Powered by 2 batteries(Not Included). Wireless design for maximum portability.