Smiledrive Long Range Wireless Remote Doorbell-Weatherproof Door Bell with 500-ft+ operating range, 50+ chimes, no batteries required for receiver Wireless Door Chime  (50 Tunes)

Key Features : 1) Long Range Wireless Doorbell: With operating range of over 500 ft (1000 ft in open area), this probably is the longest range wireless doorbell in the world 2) Weather Proof: This doorbell is rated IP33 weatherproof thus can be used in outdoors as well 3) Over 50 ringtones: With four levels of adjustable volume from 25db to 110db 4) Easy to install: Just plug the receiver into an electrical outlet, and insert batteries in the transmitter. Stick it with a double-sided tape, anchors and screws (included). With in minutes, your long-range wireless doorbell can be installed. 5) Ideal for large homes, apartments, bungalows also for elderly: Elderly can call help in case of emergency