This set of OPTO sensors (transmitter + receiver) is suitable for use on Hörmann controls (type: WA400). This receiver is equipped with LED indication so that the status of the OPTO sensors is easy to read. Both the transmitter and the receiver are equipped with a 600mm cable with plug. This set is supplied with a set of reducing sleeves (22 > 11mm) so that this set can be used in various types of bottom rubber.