Feature: 1. [Wireless Transmission Technology]The latest 2.4GHz wireless transmission technology. It can receive 10m wireless distance 2. [ 3 Level DPI Regulation] Three level DPI regulation design, 800, 1200 and 1600 DPI 3. [Silent Switch]Silent switch design makes Office Games quieter. Let you work and study quietly 4. [Colorful Lights] Colorful lights, more cool (can be turned off). Essential for fashion people 5. [Comfortable Grip] Fashionable slim design, fashionable appearance, comfortable grip and easy to carry Specification: Item Type: Wireless Optical Mouse Material: ABS Keys: 4 Keys (Left, Right, Scroll Wheel and DPI Keys) Key Life: 5 Million Times Wireless Distance: Approx. 10m / 11yd Working: Photoelectric Built in Lithium Battery: 500mAh (Rechargeable Lithium Battery) Length of Charging Line: Approx. 80cm / 31in (Error Allowed for Manual Measurement) Project Type: Ergonomic Photoelectric Mouse DPI：800 ,1200,1600 Operation Mode: Photoelectric Rated Voltage, Current: 3.7V/18mA Power Type: Rechargeable System Requirements: For Windows , for OS X or the Latest Version Mouse Size: Approx. 113 x 58 x 26mm / 4.4 x 2.3 x 1in. Package List: 1 x 2.4 GHz Wireless Mouse1 x USB Receiver1 x USB Charging Cable Note: 1.Shipped with built in battery2.Please allow 0 to 2 cm error due to manual measurement. Thanks for your understanding.