The InnovAdvance wireless cat doorbell is already a hit with thousands of cat owners.

The cat doorbell consists of a wireless rainproof infrared sensor and a receiver with flashing lights and sound (10 different sounds to choose). Attach the sensor where the cat usually comes to be let in. Then place the receiving bell inside the house wherever it suits you. The bell sounds and flashes indicate that the cat wants to be let inside.

The receiver can easily be moved between different rooms and can be set to 3 modes: sound only, light only (silent), and both sound and light. It also has an adjustable volume control.