Rain Sensor. Surface mounted, including fastening angle. Automatic heating to keep the sensor area dry. Heating operation by choke free output STV-640/STC series. or external 24VDC power supply. Current consumption of heating is less than 100mA. 5m bus connection terminal. Stainless fastening angle included in delivery. Dimensions (W x H x D): 67mm x 67mm x 29mm. Integrated bus coupling unit. 3 years warranty.