Wireless M-Bus Sensor Dimensions L x W: 105 x 50 mm Dimensions L x W x H: 105 x 50 x 27 mm Operating temperature: -20...+75 °C Power supply: 3.6 VDC RF-Input sensitivity: -117 dBm Protection rating: IP67 Emitting power: 25 mW Range with visual contact max.: 600 m