The main feature of multiple connection modes offers the possibility to easily connect and switch between several devices, using Rapoo’s reliable 2. 4 GHz wireless transmission, Bluetooth 3. 0 or Bluetooth 4. 0. MT550 also features a fully adjustable high-performance optical sensor from 600 to 1600 DPI. To enjoy MT550 for as long as possible, it also offers up to 12 months of battery life and a power button. Specifications Multi-mode wireless connection: switch between Bluetooth 3. 0, 4. 0 and 2. 4 GHz Up to 10 m range & 360° coverage Connect simultaneously to up to 4 devices Instantly switch among 4 connected devices in one click (Automatic pairing) Fully adjustable 1600 DPI sensor Comfortable elegant design Batteries required: 2 x AA Up to 12 months of battery life Colour: Black