A. 3DPI SWITCH: Using optical chips, up to 1600 dpi (800, 1200, 1600), applicable to various games with accurate tracking. B. Adopts bluetooth 4.0 technology, built-in 450mAh Lithium polymer rechargeable battery with high cycle life. The charging time is about 1.5 hours, providing lasting use time. The Auto Switch Off function helps save energy as the bluetooth mouse switches off when the PC is turned off or the receiver is disconnected. If not used for eight minutes, it goes to sleeping mode, and can be woken up by pressing any button, featuring energy saving and low power consumption. C. Supports Windows, Mac OS X, Linux, Android and most other systems, suitable for PC, notebook computers, macbook, windows tablets, and android tablets. D. Contoured shape, Ultra Thin and lightweight design, smooth surface ensures comfort and support for the hand even after long working hours. The rubber scroll wheel prevents hand slipping when scrolling. This bluetooth mouse can meet the demand of daily office working and personal preference.