Loud Flash Doorbell with 7 Colors of Bright Light and 4 Volumes, Wireless Doorbells 600 feet,at Home/Office,Suitable for the Elderly, Hearing Impaired People, 2 Transmitters with 3

Large volume, strong light reminder, long-distance home wireless doorbell, suitable for the elderly with hearing loss, deaf and dumb, hearing impaired, easy to install, 4 volumes, multiple music ringtones; It is not only a doorbell, but also a pager. Babies, pregnant women and the elderly who sleep alone can call with one button and guard their families.