http://www.draytoncontrols.co.uk/search.aspx?search=Digistat%20RF1%20Wireless%20System&page=1
Needs recommissioning, after fiddling, known issue with Battery compartments, have emailed Drayton asking for replacement drawers for batteries.
customer.careATinvensys.com
some folks have used foil, cleaned contacts and bent prongs out I'd rather have proper functioning unit.
ladyluck, October 2010