Heather ordered this off of E-bay a few weeks ago and it arrived today.
It looks like a variant of the BT Interphone and comes with a 12 month warranty and cost delivered was $93.50.......
Looks very similar to the BT units I bought of eBay a few years ago, for a few more $$. Reception and performance was very good, and was very happy until ..... one of the units won't take a charge anymore, bought a replacement, same result after a few months use. I put this down to overcharging both the units.
I've been very careful charging the remaining good unit, and have no further problems.
Every cloud has a silver lining - I don't have to listen to Mrs W anymore.