If you have multiple devices (ex. smartphone, tablet, or computer) paired with your K480 keyboard, you can switch between them using the selector dial on the upper left side of the keyboard.
Before you switch, make sure Bluetooth is active on the device you want to switch to.
Turn the dial on your keyboard to the setting that corresponds to the device (1, 2, or 3).
Your keyboard should now be connected to the Bluetooth device you selected.
NOTE: Some Bluetooth devices may not support multiple Bluetooth connections. If your keyboard isn't connecting, make sure you don't have such a device connected at the same time.