Bluetooth connection method 1. First turn on the computer Bluetooth device to add Bluetooth Then turn on the mouse switch For the first connection, long press the DPI button top of the mouse and wait for the Bluetooth search connection when the Bluetooth indicator light flashes blue. When the computer displays the Bluetooth model BT5.2Mouse, click the link. For example, if you need to change the computer connection or connect for the second time, similarly turn on the computer Bluetooth device to add Bluetooth Then turn on the mouse switch, Press the left button, middle button, and right button When the blue light flashes, it is searching for Bluetooth until the name BT5.2Mouse is displayed on the computer, click to connect, and it's done. Switch to 2.4g and long press the DPI button indicator light flashes red. Plug in the receiver and it's done Tips: It takes about a week to get used to the new grip for the first time. Traditional mice are moved by the wrist, while ergonomic mice are moved by the arm. After long-term use, fatigue and soreness in the wrist will be significantly relieved. Features: 1.Ergonomic design: The vertical mouse keeps your wrist in a natural grip, which reduces wrist wear and tear, relieves wrist fatigue, allows you to maintain a relaxed and comfortable arm posture, and improves office efficiency 2.3 levels of DPI adjustment: The mouse has 3 adjustable DPI settings of 800, 1200, and 1600, allowing you to customize your mouse speed and accuracy,Meet the mouse precision requirements of different screens and scenes 3.Wireless freedom, long battery life: The vertical ergonomic mouse adopts advanced 2.4G USB transmission technology, plug and play, allowing you to enjoy the freedom of wireless operation. It can be charged via the included cable, and the environmentally friendly rechargeable battery can be used for up to 30 days on a single charge. 4.6 buttons: The left and right buttons are designed to be silent, so you don't have to worry about disturbing others when using it in the office, dormitory or library Specification Brand name: Warvank Model: FK12 Size: 125x62x75mm Weight: about 88g Number of buttons: 6 DPI: 800/1200/1600 Connection: USB 2.4G wireless Charging interface: Type-C Note: Due to different monitor settings and lighting conditions, the actual color of the item may vary slightly from the pictures. Thanks for your understanding! Please allow a 1-2 cm difference in measurements due to manual measuring.