HP EliteDesk 705 G4 Desktop Mini Hardware Reference Manual page 51

3. Press the Connect button on the receiver for approximately five seconds. The status light on the receiver
will flash for approximately 30 seconds after the Connect button is pressed.
4. While the status light on the receiver is flashing, press the Connect button on the underside of the
keyboard for five to ten seconds. After the Connect button is released, the status light on the receiver
will stop flashing, indicating that the devices have been synchronized.
Synchronizing the optional wireless keyboard and mouse 45