INPHIC upgrades three-mode BT 5.0 / BT 3.0 / 2.4G wireless mouse - faster, more stable and widely compatible. Whether it\'s Mac, Windows, Chrome OS, or Android tablet, or switching between them, the mouse works fine. About charging: Use the computer USB port 5V / 500MA to charge, the blue light on the wheel is always on when charging, and the light is off when the battery is full. The charging time is about 3 hours. Low-voltage display: When the red light flashes at the mouse wheel, it indicates that the voltage is lowered and it needs to be charged in time. How to connect to Bluetooth mode? 1. Turn on the power switch to Bluetooth mode 2. Bluetooth 5.0 mode: (green light flashes slowly) Bluetooth 3.0 mode:(blue light flashes slowly) 3. Press the Bluetooth pairing button for about three seconds, the power indicator flashes (Bluetooth 5.0: Green; Bluetooth 3.0: Blue), indicate that the mouse is in pairing mode. 4. Search for \"BT5.0 Mouse_Pro\" or \"BT3.0 Mouse\" through your devices, and then click to match. The indicator light will go out after pairing and the mouse can be used normally. Note: 1. Bluetooth flash pairing time is 3 minutes 2. Bluetooth connection time is within 5 seconds System Support: 2.4G wireless mode: Win XP / WIN7 / WIN8 / WIN10 or higher Bluetooth 3.0 mode: Win XP / WIN7 / WIN8 / WIN10, Mac, Chrome OS, Android system Bluetooth 5.0 mode: WIN8 / WIN10, Mac, Chrome OS, Android system (Bluetooth 5.0 does not support Win 7 / XP) Note: IOS is supported, but must be IOS 13 or above system