Plastic Enclosure E.A.WL.CUS. The AirKey control unit is designed to control 1 AirKey Wall Reader by activating the electronic locking elements in the door and is easy to install in most applications thanks to its compact design. It has a high switching performance because the control unit is equipped with two relays, each with a maximum switching performance of 250 VAC. The control unit is CE certified, requires a supply voltage of 12VDC and is supplied in a plastic enclosure which is rated to IP54.. Can control 1 AirKey wall reader per control unit. Compact design makes installation easy. High switching performance - 2 x 250 VAC switching relays. IP54 rated