🎵50 Melodies with 5 Adjustable Volumes to Meet Your Needs🔊 - 55 melodies including traditional knocks, alarm clocks, Christmas, birthdays, moonlight, nature sounds and more. The volume is adjustable from 4 mute levels to 110dB. You can turn off the volume and LED light if you don't want to be disturbed, and set the LED light to silent mode (flash only) if you don't want to miss visitors. 💧Excellent Waterproof with Memory✨ - This IP55 waterproof outdoor wireless doorbell button works in rainy days and has a waterproof rubber protection ring inside. Indoors, you don't have to worry about bad weather. The wireless doorbell receiver has a memory function that retains the previous melody and volume in case of a power outage. 🔔300m Long Distance Signal Strength🔔 - The working range of our wireless doorbell is up to 300m outdoors. The signal is strong and the volume is loud, and the ringtone can be heard clearly in most places such as 2-story buildings, apartments, offices, factories,