LOHOME Wireless Doorbell Kit - Remote Button Operating at 920ft Range with 36 Chimes [1 Transmitter+2 Receiver] - Also for Elderly People Pager ANTI-NUISANCE: Using SMT dispensing technology, high frequency wireless transmission techniques, one device match one code, Effectively avoid the mutual interference by the neighborhood ring and annoyed false ring. SUPER LONG SIGNAL MATCHING DISTANCE: 50 meters is enough for ordinary families, but this doorbell's receiving distance is up to 280 meters to meet the needs of different environment, such as white-collar apartment/commercial housing/office/villa/old man contact device and etc. 36 CHIME & ADJUSTABLE VOLUME: 36 Chime for your choice, forget annoying doorbell sounds, now you can have your favorite chime! Humanized volume design: 4 levels from 0-80 db, mute is avaliable for sleeping baby. LOHOME Wireless Doorbell give your family the best care! DOUBLE RECEIVER & WATERPROOF TRANSMITTER: Double receiver is ideal for home/large office and multi-floor building etc. Totally block water intrusion thanks to its IP44 Waterproof Transmitter, effectively prolong the life of the doorbell. Say goodbye to RAIN, DUST, and DIRT! EASY INSTALLATION & ENERGY SAVING: There's No wire required, No batteries required for the receiver, just plug it into any electrical outlet (AC), and mount the push button on the wall with double-sided adhesive tape! It is also ENERGY SAVING. For Push Button: LED light flash only after ringing the doorbell. For Receiver: LED light flash after the bell rang. Start saving power from LOHOME Wireless Doorbell!