This is a new style Danfoss 2 channel programmer as shown in pictures 3 and 4. You can simply fit this new programmer onto your old FP715si backplate with no wiring needed. Please note that the FP715si is a discontinued model and the programmer we have is a direct replacement for it. Please review pictures and ask any questions you might have, we are happy to help where we can. Product features: Danfoss 2 channel programmer - Direct replacement for Danfoss FP715 SI with no wiring required7 Day, 5/2 Day & 24Hr schedules1, 2 or 3 heating periods (2, 4 or 6 events)Auto, Boost, On or Off, Holiday Modes We will send this royal mail 24hr tracked and will aim to dispatch as soon as we can once payment is received.