ELPA Wireless Chime EWS-01 and EWS-10 Set

This is a set of Asahi Electric ELPA wireless chime transmitter EWS-01 and receiver EWS-10.
It was used until recently and was in working condition.
There are scratches and dirt. The receiver shows some fading as it was used in a location exposed to sunlight.
The transmitter comes with its instruction manual, but the receiver does not. Two of the included screws remain.
Everything shown in the photos is included.

The button battery in the transmitter still seems to have some life left, so it will be sent with the battery inside. The AA batteries for the receiver are not included.