Questions about CasaControl Radio doorbell

And I have a second recipient :-)

I can't answer that... I've only been using it for a month. The bell works perfectly.

Unfortunately, the additional receiver is only available in white under the following link: CASAcontrol radio receiver for doorbell FTK-120

- Power supply doorbell (transmitter): 1 button cell type CR2032 (included), base station (receiver): 2 batteries type AA / Mignon (please order separately). - Dimensions doorbell: 90 x 36 x 18 mm, weight: 34 g, base station: 70 x 100 x 30 mm, weight: 76 g (without batteries) - Doorbell including button cell, base station, mounting material and German instructions