SECRUI Doorbell, Wireless Doorbell with 2 Receivers Easy installation, Adjustable Volume, 58 Chimes, Colorful LED, 1000Ft Range, M520+F55, Black

Loud Enough Doorbell for Anywhere – Adjustable volume and mute mode: 0 to 120 dB, 58 optional Melodies. Whether upstairs or basement. Memory function makes the doorbell remember the last ringtone and volume, no need to reset even if after a power outage.
Long Range Remote Wireless Doorbell – Ultra-long wireless 300M range with waterproof & colorful LED flash light button. Wireless doorbells without any cables. The strong and stable wireless signal ensures that you will never miss any visitors even if you are in a big house with several rooms.
Easy Installation & Support Expandable – The plug in doorbell already paired before factory and different transmitters can be set to different tunes. Expandable up to 20 accessories.