High Water Level Alarm is designed to detect alarm once the water level reaches the sensor probe, silence the alarm once the water level drops below the sensor probe. Features: High water level alarm allows you to know when the water level reaches 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 other common liquid, as well as purified water/air conditioning water/distilled water. Specifications: Material: ABS and Stainless Steel? Model: Low Water Alarm without Mount / Low Water Alarm with Mount / High Water Alarm without Mount / High Water Alarm with Mount / High and Low Water Alarm with Mount / High and Low Water Alarm with Mount 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