Control element, 2-way, metallic gray, Busch-Installationbus KNX, Control elements solo with enclosed bus coupler, Control element, 2-way with enclosed bus coupler For Busch-Installationbus KNX With labeling field. Transparent labeling sheet with standard symbols included in delivery. Control elements: push buttons left/right Display elements: LED to display the switching status Protection class (device): IP 20 Temperature range (device): -5 °C to 45 °C Dimensions (H x W x D): 63 mm x 63 mm