Aquatec Dive Horn With Standard QD Fitting - HS CODE - 9506290000  C.O.O. - TW Compact sized SCUBA Horn, attaches between a B.C.D. Inflator and Low Pressure Direct Feed Hose. Generates a loud resonating frequency both under water and on the surface to attract attention either in an emergency, part of diver training or pointing out features. Fitted with DIN type QD Hose Connection, can be quickly and easily installed and removed. 125-135 DB noise level underwater and can be heard on the surface over a distance between ? and 1 mile.