Sonic blast underwater horn signaller

Tried of your buddy diving away from you and not being able to contact him? Fear No More Sonic Blast is Here!   Key Features: Horn works both underwater and on the surface Small on size, BIG on decibel Easy to connect and disconnect Low maintenance Requires just a tiny bit of air to active the horn Approx surface range of 0.25 - 0.50 miles Volume: 115 - 125 dB (approx) ONLY Fits standard power inflator   Instructions:   To Use: Sonic Blast can be easily installed by connecting the appropriate ends to the BC hose and the BC inflator. It will become operational once ressurized air is put through the BC hose.     General Maintenance: Is important to immerse and clean the exterior of Sonic Blast in freshwater after each dive. Sound the Sonic Blast several times to expel any water trapped within. Dry and store in moisture-free place.