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/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/well/river/sea/sewage and other common liquid, but NOT APPLICABLE to purified water/air conditioning water/distilled water. Specifications: Material: ABS + Stainless Steel Model: Low Water Alarm without Mount / Low Water Alarm with Mount / High Water Alarm without Mount / High Water Alarm with Mount / High Low Water Alarm with Mount / High Low Water Alarm with Mount and Adjustable Volume (Optional) Voltage: AC 220V Cable Length: 15m / 49ft Alarm: 90dB Item Size: 117 * 89 * 225mm / 4.6 * 3.5 * 8.851in Item Weight: 909g / 32.06oz Package Weight: 1152g / 40.63oz Package Size: 26 * 18.5 * 19.5cm / 10.23 * 7.28 * 7.67in Packing List: 1 * Water Level Alarm