???Your Intelligent Wireless Doorbell?60 selected melodies to switch at will, the first ringtone preview mode, long press the button to listen to the prelude of each song for 2 seconds, easy to find your welcome song. 5-speed volume adjustment and mute mode, the baby's nap, the night rest will not disturb the family. ???Boundless Guardian Precise Response?1000ft reception distance and maximum 110dB volume, whether it is a duplex or a single flat, even if the courier is outside the door on a rainstorm day and presses lightly, you can hear the alert clearly in the bedroom. Anti-interference technology, goodbye to false ringing. ??3s to Complete the Installation?No wiring required! The receiver is plug and play, with stickers easily on the wall. Power Failure Memory automatically saves preferences, and still remembers your favourite Canon ringtone and comfortable volume after an unexpected power outage, just like having a caring electronic housekeeper. ???High-quality Protection?Stable operation from -4 F to 140 F, heavy rain, snow and sunshine, replaceable CR2032 coin cell battery with 3 years of long life (5 measurements per day), and IP55 waterproof button can withstand the wind and rain. Dual EU CE/US FCC certifications for safety and security every time. ????Professional After-sales Guarantee?If the doorbell kit for home have any problems during use, you can contact us directly through Amazon for after-sales service, we have a professional customer service team and experts to provide you with the pre-sales and after-sales service. FOVKSUC is always at your side!