Signal at surface.
Volume: 125- 135 dB.
It's very loud keep away from your ears.
Clean in fresh water after use.
Three models are available to fit of 95% of the inflators currently available.
SH-126-01: Fits All Standard Inflators. (International connector.)
SH-126-02: Fits ScubaPro Air 2, Tusa Duo-Air Atomic SS1, Sherwood Gemini, and Zeagle Octo-Z.
SH-126-03: ScubaPro Air 2, SeaQuest AirSource 1&2, Zeagle Octo-Plus, Oceanic Air XS & MARES AirControl AirSource 3 QD.