Sennheiser EW-D Color Coding Set

In a rack of eight identical receivers feeding eight identical bodypacks, the thing that goes wrong under pressure is a pack handed to the wrong performer. This set is the low-technology fix: matching colour labels for the transmitter and its receiver, so the link is identifiable from across a dark stage without reading a display.

Sennheiser sells the set covering EW-D EM receivers, EW-D SKM-S handhelds and EW-D SK bodypacks, and also breaks it out per device type for topping up a specific part of the rack. It is the kind of accessory nobody specifies until the first time a show goes out on the wrong channel.