ABB Busch-Jaeger Basic Unit Installation Switch - 2CKA001011A0928

This changeover switch from Busch-Jaeger has two control buttons and is used to control two different changeover switches from one location. For example, you can place a changeover switch at the bottom of the stairs to control the light in the hallway with one rocker and the light upstairs. That light can be turned off again upstairs with a changeover switch.