Designed to meet all conditions and provided splendid durability<br> Sealed in expoxy for protection against dust, moisture and vibration<br> Voltage polarity protection<br> Rohs compliant, CE certified <br> Dimension:5 x 2.9 x 2.8 inches<br>Output level: 87-107dB +/-4dB @4 ft <br> Voltage: 12-36VDC <br> Current: less than 0.8A<br> Temperature range: -40 ℉ (-40℃) to 185 ℉ (85 ℃) <br> Frequency: 1240Hz +/- 10%<br> Protection grade: IP68