Advent Wireless Keyboard (missing dongle) (New Marston OX3)
Advent Wireless Multimedia Keyboard, model AKBMM15. I think it's this on Amazon: https://www.amazon.co.uk/Advent-akbmm15-AKBMM15/dp/B015LWCRAM . However, this one is missing the Bluetooth dongle that the manual shows. I'm guessing it ought to connect to Bluetooth devices (phone, tablet...) but it's not doing so for me.
This offer has been gifted to someone and is no longer available.