To use the KA300TX transmitter with the KBS300RX Bed Shaker Receiver, attach the transmitter to the siren of an existing alarm unit, such as a smoke detector or carbon monoxide detector using a hook & loop type fastener, such as VELCRO® brand fasteners. When the transmitter is activated, it will signal the alarm monitor receiver(s) with the corresponding alert (smoke detector, carbon monoxide detector, weather alert).