1.Wireless Bluetooth Vertical Mouse: Ergonomic design helps relieve wrist fatigue during long hours of computer work or gaming, preventing repetitive strain injuries to the wrist. 2.Programmable Mouse: Features more buttons than ordinary mice. It has 8 buttons with 2 sets of configuration files, enhancing work and gaming convenience and speed. It has 32KB onboard memory to save customized settings for use on different computers without re - editing. 3.Rechargeable Mouse: Equipped with a built - in 730 mAh rechargeable battery. Utilizes 2.4G wireless radio frequency and Bluetooth technology, capable of receiving signals within 10 meters, providing convenience for use outdoors or while traveling and reducing the inconvenience of wiring. 4.NOTE: The receiver is at the bottom of the mouse and needs to be inserted into the computer USB port. Peel off the mouse pad protective film on the bottom of the mouse before use. Charge the mouse for 2 - 3 hours when using it for the first time. Apple computers (Mac OS X) do not support.