EBOFAB Foldable Bluetooth Keyboard, Folding Portable Wireless Keyboard Wired USB, Wireless Handheld Multi-device Keyboard Compatible with Desktop, Laptop, Tablet, iPad, Mac multimedia_keys,Foldable Bluetooth Keyboard, Folding Portable Wireless Keyboard  (Black)

Multi-Device Connection 1. When connecting the first device, first press Fn+A and then press Fn+C to start the connection. 2. Before connecting the second device, press Fn+S once, then press Fn+C to start the connection. 3. Before connecting the third device, press Fn+D once, then press Fn+C to start the connection. 4. To use multiple devices at the same time, press Fn + A / S / D to switch to the connected devices freely. 5. Select the system according to your device: press Fn + Q / W / E / R (iOS / Andriod / Windows / Mac) at the same time, then you can use your keyboard comfortably.