60 MUSIC, 4 VOLUME LEVELS: You can change ringtone with the push of a button, this wireless doorbell has 60 melodious ringtones from around the world. It also comes with a seven-color flashing light, this product has four adjustable volume levels (including silent mode), the flashing light will always be on in silent mode to meet your different needs. 400 Meters Long Range Coverage: The doorbell has good signaling ability to penetrate the wall, the wireless signal can be transmitted in a super long range of 400 meters (in open area), the signal can completely cover your home and will not be easily interfered by other devices. WITH MEMORY FUNCTION: This wireless doorbell will automatically remember the volume and ringtone you have chosen, it will automatically start after being unplugged and turned on or off, and you don't need to reset it to your preference after restarting. WATERPROOF AND DUSTPROOF: With IP44 waterproof and dustproof function, the wireless doorbell can also be used