This Is a Rapoo Mt550 Multi-Mode Wireless Mouse.

Connectivity: Supports Bluetooth 3.0, 4.0, and 2.4 GHz wireless via a USB dongle. Multi-device: Can connect to and switch between up to four devices simultaneously. Performance: Features an adjustable DPI sensor up to 1600 DPI for high precision. Battery Life: Offers up to 12 months of battery life.