RF Doorbell call transmitter (Lisa RF)

The LISA RF doorbell call transmitter is specially intended for homes without a doorbell. The call transmitter is simply mounted on the outside of the door.
As soon as a call is made, the receiver used will vibrate or flash (depending on the type) and, if desired, emit an acoustic signal at the flash receiver. The call transmitter is equipped with a selector switch for 10 channels. You will receive this doorbell call transmitter including battery.