Cat Doorbell
This is a good alternative to a traditional cat flap. No more holes needed in a door or wall! The Cat Doorbell is a wireless doorbell for cats that is equipped with an infrared sensor. You hang the sensor in a place where the cat usually wants to come in. You then place the wireless receiver indoors. As soon as the cat wants to go in, the Cat Doorbell will flash and make a sound.
There are several sounds to choose from, and you can choose to flash only the light or play just a sound.
The bell and sensor are battery powered (not included).