A2: The advanced Bluetooth 5.0 connectivity in the Optimus BT allows you to pair and seamlessly switch between up to 3 gadgets at once. So whether you want to type an email on your Windows laptop before reviewing numbers in a spreadsheet on your iPad, or take a call on your iPhone in between, this keyboard makes device-hopping easy. The multiple-device pairing essentially eliminates the need for you to disconnect and reconnect devices when shifting tasks.