Low Water Level Alarm is designed to detect and alarm once the water level drops below the sensor probe, and silence the alarm once the water level reaches the sensor probe. Features: Low water level alarm allows you to know when the water level drops below the sensor so that you can take timely measures. Two stainless steel probes which are attached to 15m or 49ft cables can be positioned at a desired point for liquid detection. Equipped with a silencer switch so the audible alarm can be silenced whenever necessary. Operates on 220VAC, rugged housing, requires little maintenance. Can be applied to tap water or well or river or sea or sewage and other common liquid, but NOT APPLICABLE to purified water or air conditioning water or distilled water. Specifications: Material: ABS and Stainless Steel Model: Low Water Alarm without Mount or Low Water Alarm with Mount or High Water Alarm without Mount or High Water Alarm with Mount or High and Low Water Alarm with Mount or High and Low Water Alarm with Mount and Adjustable Volume (Optional) Voltage: AC 220V Cable Length: 15m or 49ft Alarm: 90dB Item Size: 117 x 89 x 225mm or 4.6 x 3.5 x 8.851in Item Weight: 909g or 32.06oz Package Weight: 1152g or 40.63oz Package Size: 26 x 18.5 x 19.5cm or 10.23 x 7.28 x 7.67in Packing List: 1 x Water Level Alarm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.