Suitable system: USB 2.4G version supports Windows/Mac, Bluetooth version supports Windows/Mac/ios/android. Instructions: USB connection: Step 1: Insert the receiver into the computer's USB port Step 2: Press the power switch at the bottom of the mouse to 2.4G mode, and the power indicator at the bottom of the mouse switches turns green and flashes. Step 3: Move the mouse or press the left and right buttons to use it normally Bluetooth connection: Step 1: Turn the power switch on the bottom of the mouse to Bluetooth mode, and the indicator will turn blue and flash. Step 2: Open the tablet/computer/mobile phone, click "Bluetooth" interface in the setup menu, connect the paired mouse (BT5.1 mouse). Step 3: Move the mouse or press the left and right buttons to use it normally. Instructions and precautions: 1. When the mouse cursor moves slowly, please check if the battery is low. It is recommended to charge it in time. 2. When the mouse cannot be connected, please check whether the power switch at the bottom of the mouse is turned on and select the correct connection method or move the USB receiver to another USB port to use it. 3. If you do not use the mouse for a long time, turn off the power switch manually to save power. 4. If the mouse is not used for a long time, it will automatically enter sleep mode. Move the mouse or press any key to wake the mouse.