Neutral necessary - otherwise primaa

You have to make sure that to connect a neutral conductor must be present. This is by no means in all switches in the case. For us it was exactly in half of the cases like this. For other blinds I have the switch "troll" used which requires only phase (L1) and two switching wires (up + down). The time switch Troll's total also significantly more noble in appearance, it costs almost three times.
The Jarolift timer serves its purpose and is easy to operate and easy to program.
Although the durability can not say anything yet, but so far I am fully satisfied with the time switch.
For our Busch-Jaeger-aperture we needed each a "Adapter Ring" (Busch-Jaeger 1746-214-101 central disk). Caution: There are two whites here. Once something warmer white ("white" color code 212) and even the colder White ("Alpine White" color code 214) which I needed.