Evo Labs BTM-001 Bluetooth Wireless Optical Mouse - Plug and Play - No Drivers Required (Bluetooth Connection Required) Pairing Instructions 1. Insert battery. 2. Turn mouse on using switch on the bottom. 3. Press and hold the Left, Right and Middle Scroll buttons for 5 seconds. 4. Mice will then appear on your Bluetooth device list. Model Number BTM-001 Design Home or Business Connection Bluetooth Wireless Sensor Optical Resolution 800 DPI Number of Buttons 4 (left, right, middle button with scroll & DPI change) Colour Matte Black System requirements Windows 7, 8, 8.1, 10 Bluetooth connection 1 AA battery (Not included)