Wide Range Wireless Range- With strong wireless signals up to 500M in your home or business in open space.The transmitter (button) has strong penetrating power.You will never miss the arrival of a visitor wherever you are.Since the signal code of each wireless doorbell is different, it will not interfere with other devices in your home or your neighbors IP55 Waterproof Design- The transmitter can work in temperatures between -10 and 60 (14F up to 140F).Waterproof IP55, the transmitter (button) can withstand the baptism of rain and harsher climates, you can put it outside the door. Visual signal- The circular LED light of the receiver flashes, which leads to an ideal set up for the hearing impaired and the elderly.Lighted buttons help visitors find the doorbell at night and let you know if your doorbell is working Easy to install Simply plug the pluggable receiver into the wall outlet and attach the transmitter (button) to the wall.All necessary accessories are included in the package. 36 Chimes & 4 Adjustable Volumes- A total of 36 different ringtones, 4 levels adjustable from 0db to 115db, you can simply choose your favorite melody that you like the most and choose according to your habits and hobbies.Can also be used as a wireless paging device when needed