Primetake’s new generation Sound and Flash devices (known and ‘flash bangs’, ‘stun grenades’ or ‘distraction devices’) have been designed in cooperation with elite police and special forces around the world, to be extremely safe, user friendly but highly effective, the devices bottom and top vent (BTV) to prevent hand injury to the user. They have a low smoke signature so that they do not obscure the target and have a powerful percussive force.The sound is powerful and creates a pressure wave that hardens the tympanic membrane inside the ear and causes a loss of balance – thereby reducing the offensive capability of a threat. The powerful light emission causes unprotected eyes to temporarily shut down – again reducing the someone’s offensive capability.