Features: It can adjust DPI in 3 levels, install 2*AAA batteries, and the decorative lights are colorful lights. The receiver is plugged into the USB port of the computer, and the mouse power switch is turned on to be used. You don't need to install the program, you can also operate while charging. Left hand ergonomic vertical mouse. Designed for the left-hander, it is suitable for the natural position of the palm and wrist muscles. 6 programmable buttons. 800/1200/1600 dpi setting. Plug and Play mouse with Nano USB receiver, easy to use, with standard settings. The back of the mouse is equipped with a storage box for easy carrying. Automatic power saving: After 10 seconds in standby mode, the mouse automatically enters the power saving mode, and the sleep mode is 8-10 minutes. Two internet navigation buttons, back and forward, are conveniently located on the left side of the mouse, giving you internet browser control, minimal manual. Broad compatibility: compatible with most systems, including for Windows, Mac and Linux. Suitable for laptops, PCs, laptops, computers, for Macbooks and other devices. Specification: Model: Five generations of left hand battery version Type: Optical Mouse Colour: Black Mouse size: Big Mouse (120mm) Connection with computer: wireless Applicable models: laptop Photoelectric resolution: 2000dpi Number of buttons: 6 keys Interface: USB Color box packaging: yes Size: Approx. 68 * 130 * 81 mm/ 2.67 * 5.11 * 3.18 in Weight: 96 g Package list: 1 * Wireless Mouse (Battery model 2 * AAA (not included)) 1 * Wireless Receiver 1 * User Manual