Ringtones&Sound Volume Setting Easily: 58 ringtones with 4 adjustable volumes in cycles, 25dB to 115dB, satisfy various people's requests in different circumstances, as long as press and loosen your finger until the desired one selected, then release your finger.
Powerful Signal, LED Flash: Powerful wireless signal with transmission distance up to 1300ft. Higher penetration without worrying about the signal being hindered. Especially LED flash design for the people with hearing impaired to remind someone coming.
Waterproof Rating IP55: IP55 Rating Waterproof Design for the transmitter, which can work under temperature between minus 22F and 158F, and withstand various harsh weather, sunshine, rain, snow, freezing, etc.
Energy efficient: The plug in receivers operate at AC 110 to 220V, and the annual electricity bill does not exceed 1USD, while the transmitter requires only one piece of 23A 12V alkaline battery, its lifetime up to 3 years.
Easy to Install and Use: Suitable for house, office, receptions, etc., insert the plug into a socket for receivers, install the transmitter with a sticky pad or screws with anchors, please read the User Manual carefully.