Wireless Doorbell Loomin Waterproof Portable Blue Led Indicator Doorbell with Remote Button Waterproof : The Loomin Doorbell can be mounted indoors and outdoors instead of most non waterproof buttons in the market , touching button also enhance your experience. Long Operation Distance: The Doorbell Operation range of this doorbell kit up to 500 feet (1000 feet in open area), wireless range may depending on construction and materials. Also remember do not mount the pushbutton on metal materials 52 Chimes with 4 levels Volume Adjustable (from 25db to 110db): allow you to change the tune with your mood as well as set tune to a specific receiver chime wireless doorbell offer your more choice to make it your own individual style. Easy to install &use: Simply stick it where needed, using the double-sided adhesive tapes within minutes. Does not require any wires or screws. Applied as a emergency signal transmitter: Perfect to look after the young and the old. This can be specially used as professional pager for the old. When an old man meets with an emergency, he just needs to slightly press the transmitter button, his family can receive his signal for help