The AQUATEC Duo-Alert is very compact in size. Only the best quality component is used in manufacturing of the AQUATEC Duo-Alert. The loud resonating frequency generated by this horn can be heard on the surface or approximately over a 1.0 K. range, and U/W approximately 100 meters.
The unit is light weight and compact (so great for travelling) and has a volume of up to 125 decibels!