•� � ﹤Long Time Operation﹥: Built-in 450mAh Rechargeable Li-ion Battery, full charge 3 hours with Type-C charger, uninterrupted work over 90 hours, standby for 6 months Please Read Before Buying: Keyboard Features1 Support Bluetooth HID connection2 Support Android, iOS, windows. 3Dealing with line drawing on the surface container. 4. Lightweight portable5Use Broadcom Bluetooth chip, stable and fast connection. 6. Practicing keyboard structure, comfortable to use Bluetooth Keyboard Pairing Step 1: Turn on the keyboard, the status indicator flashes for 5s then turns off Step 2: Press the 'FN+C' key, the Bluetooth indicator flashes Step 3: Open Bluetooth and search, PC tablet automatically or manually search for the keyboard (Bluetooth name: Bluetooth Keyboard), dlick connection Step 4: Connect successfully, the Bluetooth indicator turns off. ( � � ) button Press once: turn on backlight, Press twice: switch to breathing light Press three times: turn off all lights Note: For other Bluetooth devices that can be activated, be careful to check Bluetooth standards and compatibility before connecting