This weather-resistant bell push is power-less, until someone presses it! Like magic, the action generates kinetic energy, which instantly sends a wireless signal to the receiver, plugged into any 13-amp socket in your home up to 100 metres away. Choose from 26 different chimes and 3 different operating modes: sound only, flashing light only, or combined. Volume control up to a loud 85db. Includes wall fixings and adhesive pad. Bell push, H8.5 x W3.5 x D3.3cm. Receiver, H8.5 x W8.5 x D5.5cm.