Rialco 84010 Flood Alarm with 11 inch Sensor Arm; 1-Pack Rialco High Quality Flood Alarm. 11 INCH Long Flexible Sensor Arm that can be Easily Bent to Reach into Small, Awkward Spaces. Quality-Built and Made of Heavy-Gauge, Durable ABS Plastic. Operates On 1 9V Battery (Included) that Sounds a Shrill 96 Db Horn When Water Contacts The Sensor. Comes with Mounting Bracket/Screws for Easy Installation, or Arm can be Bent to Self-Support Unit.