Dive Alert Plus V2 994701 Lautanmas Dive Alert Plus V.2 Dive Alert Plus v.2 HORN. for scuba diving purpose CORAL DIVE STORE Dive Alert Plus V2 Splash Underwater Imaging DIVE ALERT Plus V.2 A Dual Function Surface Subsurface Underwater. DiveAlert Plus is a specially designed, small, light weight pneumatic signaling device that uses quick connect disconnect hose couplings to become an integrated part of your power inflator. Installation is easy and takes only a moment. DiveAlert Plus uses a small amount of air from your SCUBA tank to make a piercingly loud sound in air or water. People have been able to hear a DiveAlert Plus one mile away from a diver in need above water. In conditions where visibility is limited, a DiveAlert Plus can be a life saver. Underwater you can sound for attention quickly with a squeeze of the device.