Feature: 1. Wireless dual compatible, can be used on laptop or desktop computer 2. Ergonomic design, more comfortable to use, easy to operate and intimate 3. Built-in lithium battery, fast charging, intelligent power saving, no need to replace the battery 4. High-quality shell technology provides comfortable feel 5. Reliable 2.4GHZ technology, which can provide reliable wireless connection in a range of up to 10 meters, more convenient to operate Specification: Item Type: MouseOptional Style: White Silent Type, Black Silent TypeWireless Distance: 10 meters Key Life: 20 million times Battery Capacity: 600MAh Charging Method: USB Response Speed: 150PCS Wireless Technology: 2.4GHz Voltage and Current: 3.7V-18MA Number of Keys: 6 keys DPI Switch: 800.1600.2400 third levels adjustment System Requirements: for Windows XP / for Vista /7/10Size: Approx. 138 x 80 x 38mm / 5.4 x 3.1 x 1.5in. Package List: 1 x Mouse 1 x Chinese and English User Manual 1 x USB Data Cable Note: New‑style and old‑style are shipped randomly