How to use it:A. 2.4Ghz Mode:Switch to "ON/OFF" button to right.And Plug the receiver into the USB port of your computer, Then you can use the mouse in 2.4GHz Mode.B. Bluetooth Mode:Turn on the device's Bluetooth functionSwitch to "ON/OFF" button to left. (Bluetooth mode)Search the product of Bluetooth and find “BT5.1 Mouse” to pair. Then you can use the mouse in Bluetooth Mode.Note:System Requirement: iPadOS 13 or later, iOS 13 or later, Windows 8/ 10 or later, Mac OS X 10.10 or later, Android 5.0 or later.Package Included:1 x Wireless Mouse1 x USB Receiver (In the battery compartment of the mouse)1 x USB Charging Cable1 x User Manual1 x Type C AdapterNote:1. It's out of power if the mouse cursor moves slowly or stop moving. Please recharge it. Note: Please do not charge the mouse with mobile phone charger.2. Please charge the mouse for 2 hours before the first time to use it. The blue light beside the scroll wheel will be on while charging, and then goes off when the mouse is fully charged.3. Not all computers support two modes. For example, Win 7 system does not support Bluetooth mode.