Amazon.com has Honeywell Premium Portable Door Chime, 3 Push Buttons
In cart, item title is 'Honeywell RCWL330A1000/N P4-Premium Portable Wireless Doorbell / Door Chime and Push Button'.
CCC says lowest price in the past, sold by Amazon.com. The previous lowest price was around $34, maybe.
- According to Q & A (Thanks, L Dub)
The receiver is battery operated
so there is no need for 110 or 220. The actuator is also battery operated
- L Dub answered
on June 9, 2017