BUILT-IN-BATTERY: Built-in battery, easy to charge with micro USB cable, no need for additional AAA battery.Please hold the mouse power switch in the " ON " position when charging. Wide compatibility: compatible with most systems including Windows, Mac and Linux. Suitable for notebook, PC, laptop, computer, Macbook and other devices. Note: Not compatible with Apple iPhone, iPad, MacBook 2016 or MacBook Air. DP3 DPI Switch: With powerful optical chips, up to 1600 dpi (800, 1200, 1600), can be used for all kinds of games, accurate tracking. Car energy saving sleep mode: Li-polymer batteries, high cycle time. The auto-power-off feature helps you save energy by turning your Bluetooth mouse off when your PC is turned off or the receiver is not plugged in. If you do not use the mouse for eight minutes, it goes to sleep mode. You can press any key to weaken it. Quality guarantee: one year warranty for this Bluetooth mouse. Production Description Color Name: Bluetooth / Matt Black Features: - Ergonomic design with a fashionable look and pleasant to the touch - Professional optical positioning technology that makes the positioning of the optical motor more precise and sensitive. - Automatic connection without cumbersome programming - Built-in battery, can be charged directly via adapter. - DPI: 800 DPI, 1200 DPI, 1600 DPI - Wireless transmission frequency: Bluetooth 3.0 - Range: 10 meters Specifications: - Product size: 112 (L) x 58 (W) x 50 (H) mm - Product weight: 100g Compatible systems: Compatible with Windows XP, Linux, Windows 7,8,8,8,1, Android Package contents: - 1 x 1600DPI Wireless Mouse with built-in battery. - 1 x Micro USB Charging Cable - 1 x user manual.