Sensor unit 1-way, wireless, Busch-free@home, sensors / motion detectors / room temperature controller, wireless, sensor unit 1-way, wireless for Busch-free@home For sending switching, touch, dimming and blind commands to a Busch-free@home actuator. Communication with the free@home system is wireless. For contacting 1-way rocker switches 6230-10-xxx, 6231-10-xxx, 6232-10-xxx, 6233-10-xxx and 6234-10-xxx. With spread fastening Control elements: top/bottom touch contacts Display elements: LED as orientation light or to display the switching status Nominal frequency: 50 Hz/60 Hz Protection class (device): IP 20 Temperature range (device): -5 °C to 45 °C Dimensions (H x W x D): 71 mm x 71 mm x 45 mm Installation depth: 32 mm