Viessmann 100 UTDB Room Wireless Thermostat Vitotrol 100 7543788601033106 Programming Model UTDB-RF2
Bought new, tried it for a few weeks and removed it. Including new batteries. I don't have instructions but it can be downloaded from website.
I put a manual programmer instead of digital that's why I sell this wireless programmer.
Buy it now £79
UK BUYERS ONLY PLEASE!