Homasy Wireless Doorbell Portable Waterproof Safety Doorbell Operating at over 1000ft Range With Over 50 Chimes, 4-Level Volume - White Fabic / 0.02% Imported Wireless Range up to 1000 Feet (300m) in open space, 52 Chime Options, IP55 Waterproof, 4 levels of adjustable volume from 25db-110db, Easy to Leave Message, Waterproof Wireless range up to 1000 Feet (300m) in open space. Never miss any visitors. Used as paging devices for elderly care and nursing residents 52 Chime Options(Including 16 chords). 4 levels of adjustable volume from 25db-110db. Customize your volume easily by volume button IP55 Waterproof Transmitter. The transparent compartment at the bottom of the transmitter allows visitors to leave message for you Flashing Light Hint. The transmitter button will flash blue light to add additional alert. The receiver will flash white light to give them a friendly hint Easy Installation without wiring. Plug receiver into an electrical outlet. Mount transmitter through double-sided adhesive tape or included screws / anchors