Audible scuba diving signal device

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A brand-new, never used and exceptionally loud signalling device. Dive Alert Plus Scuba Signaling Device
No diver should be without one. Signal a buddy while submerged or get the attention of a boat on the surface. The only dual function signaling device. DiveAlertPlus is a specially designed, small, lightweight pneumatic signaling device that uses quick connect & disconnect hose fittings to become an integrated part of a diver's BC power inflator. Installation is easy and takes only a moment. DiveAlertPlus does not require any modification of your other equipment, and it does not interfere with the normal operation of your other equipment. DiveAlertPlus enables you to signal both above and below the water's surface.$100