【Energy Saving, Long Life】：Ultra low power consumption; The doorbell operates automatically, pressing 200000 times, 28 times a day, and can work for 25 years; IP44 dustproof and waterproof, able to withstand various adverse weather conditions. 【300m/1000 Ft Ultra Long Wireless Range】：The signal can pass through the obstacles well. The doorbell will remind you in time whether it is an apartment, a villa or an office, to ensure that tourists or parcels will not be lost. The Cheelom wireless buzzer is your faithful assistant. 【58 Music Ringtones】：40mm stereo speakers provide rich and clear sound; Press the "Next" or "Back" button to easily select from 58 tunes; 4 adjustable volume levels, with a maximum volume of 115 dB; Whenever someone knocks at your door, please enjoy the melody. 【Easy to Install】：Just insert the receiver into the socket and fix the transmitter on the wall or door frame with tape or screws. So far, this wireless buzzer kit is the best choice for your home and business. (Use distance of 50 meters) 【Guarantee】：30 days free return, 2 years warranty, MOLOR products guarantee fast delivery. If you have any questions about our products, please email us, and we will reply you within 24 hours.