With a separate receiver and wireless kinetic push button that can deliver a strong signal up to 30m, never miss a customer or visitor with this battery-free and total wireless doorbell. A compact door chime system that's completely wireless. Easy wireless installation, receiver unit plugs into mains power. Doorbell runs from kinetic energy with no batteries required & up to 30m range. Battery-free push button with up to 100,000 press lifetime. IP44 Water-resistant push button. 4 Levels of adjustable volume with 38 customisable chime sounds plus a silent mode Just turn the volume of the chimer down and let the LED light alert you when somebody is at the door