SCUBAPRO Dive Alert Plus
An alternative to expensive sound signals. The TANK BANGER is an effective instrument to attract attention under water. Simple to operate and use, quick to install and long-lasting.
Stretch the band over your scuba tank. To get your buddy's attention, reach back, grab hold of the ball, pull it away from the tank, and let it go.
This ball is a useful accessory that is unbeatable in terms of price-performance ratio.