Features: Mini Size, Free Electronic Chime Included: Small and light doorbell. It\'s simple and beautiful. Versatile Remote Doorbell: Waterproof and suncare w-ireless doorbell chime, multiple use for home, office, garage, store, office, apartments, villas, garden, hospital, school the disabled people etc. Adjustable V-olume Diversified Selection:This w-ireless Doorbell offers 38 classic melody chimes with three kinds of adjustable v-olume control to suit your needs. Long Distance Control:Operating scope up to 150 meter in open area ensures you to hear the bell and answer the door in time. Remote-control and p-enetrating p-ower, signal stability. Generating P-ower By Pressing The Button: By pressing the button to drive w-ireless signal, no wire and no rechargeable cell.