TechInfo: Power: 230V, 50 Hz Current: <= 20 mA capacitive Sound Output: 110 dB Signal Sensitivity: 15 mVpp min 50 mVpp max at 120 kHz Input Impedance: <= 55 ohm (L-N) at 12 kHz Temperature: -10°C to 50°C (operation); - 20°C to 70°C (storage) Dimensions: 53 x 123 x 33 mm EMC Emission: according to EN 80081-1 EMC Immunity: according to EN 680082-1 Electrical Safety: according to EN 60950 and EN 60065