You spent a lot of money on your camera and underwater housing. Protect that investment from accidental leaks and water damage with this water leak sensor! Even just a small leak that goes unnoticed during a dive can easily destroy your expensive camera if it comes in contact with the electronics inside. If any water comes in contact with this sensor, it emits an audible alarm and flashes red to warn you immediately to surface before it's too late. Installation instructions: Simply position the sensor on the bottom of your housing and secure the wires and the rest of the electronics using the self-adhesive pads and wire tacks.