Cambond (99% positive feedback lifetime) via Amazon offers its Wireless Waterproof Battery-operating Doorbell Kit with 2 Receivers for $14.99 Prime shipped when you use code 6JKZH7U7 at checkout. Normally $23, this is a match for its all-time low and the best available. Perfect if you have two ends of the house you want to be able to hear the doorbell in. Rated 4.5/5 stars.
Nomad Base Station
Cambond Wireless Doorbell Kit features:
- 500ft / 150m Long Wireless Range, and the doorbell with two receivers to ensure never missing a visitor when you are in the upstairs or another room, Products have been paired in factory, you can also add transmitters or receivers depending on your need
- 58 Different Ringtones available, 4 volume levels from 25-85dB, and 4 models of sound and LED flash (1, Ringing + LED Flash 2, Ringing only 3, LED Flash only 4, Ringing + LED all the time (like a night light), LED indicator of the doorbell for hearing impaired person
- High Performance Push Button Transmitter, IP44 waterproof doorbell transmitter can be used outside in rain or shine, working temperature from -4 to 140 degree Fahrenheit and the battery in the transmitter has a 3-year lifespan