Duo Alert surface air horn and underwater signalling device is now even louder, so it can be heard from up to 1.5 km away!
The compact unit fits in between your inflator hose and your inflator and can now be fitted on a whole range of different inflator connections.
The Duo Alert is a combination of two very effective signalling devices, one for underwater use to get your buddies or your dive group's attention, the other for surface use to signal where you are (for example to boats or people on shore).
The unit is light weight and compact (so great for travelling) and has a volume of up to 125 decibels!