Features: 1. High Sensitivity: When two electrodes on the bottom are in contact with water/liquid, a loud 90dB alarm is immediately issued to remind you to effectively prevent water waste or flooding. 2. Easy To Use: No wiring, no buttons, no programming, can be mounted on the wall or placed on the floor. Simply turn off the cover and install the battery. 3. Durable Material: The water sensor is made of durable ABS plastic, which is robust and lightweight, it floats on the water and no water has to penetrate the inner electronic parts. 4. Save Energy: Powered by 1 x 6F22 9V battery (optional), which consumes very little power and can last a year for the safety of your home. The battery can be changed when the alarm sound is quiet (no warning message when the battery is empty). 5. Areas Of Use: This water detector is often used in places where water can escape. Simply place your water alarm near the bathroom, kitchen, basement, garage, boat, and water pipe. Specification: Material: ABS Color: Multicolor Optional: With Battery, Without Battery (Need You Prepare 9v Battery) Product Size: Diameter: 82mm, Height: 32mm Product Weight: 150g Package Included: 1 x Water Alarm