Videos tagged with IWA Mark V

This video compares the potency of different IWA International "Thunder Flash" devices. The speaker demonstrates three models: a smaller, less potent version, the Mark V (implied to be more potent than the small one), the Mark 7, and the Mark 9, which is designed to be audible to underwater divers. The Mark 9 is noted as being exceptionally loud, causing temporary hearing impairment even at a distance.