RAPOO MT550 Multi-Mode Wireless Mouse - Adjustable DPI 16000DPI, Smart Switch up to 4 devices, 12 months Battery Life, Ideal for Desktop PC, Notebook Switch between Bluetooth 3.0, 4.0 and 2.4G Intelligently switch among multiple devices Ergonomic design, comfortable for small hand Six control buttons 600-1600 DPI tracking engine Up to 12 months battery life Multi-language