Nominal voltage : 12 Vdc Voltage range: 11,5-13,8 Vdc Current consumption: 9A Sound pressure level: 110 (2m) dB(A)Frequency "L": 405Hz "H" -500Hz.Operating temperature: -30° to +80° °C Storage temperature: -30° to +80° °C Corrosion resistance: >480 (salt spray test)Hours Operating relative humidity: 30 to 100 % Durability (1 sec ON, 4 sec OFF) : >50,000 CyclesContinuos blowing > 3 min Electrical insulation :1000 Vdc Vibration (30 min, 3 axis) 1 g Weight : 220 gr each. Main Materials : ABS, Steel