Check out the amazing Seachange Technology Shark Shield Freedom 7 Shark Repellent It Features: It is the preferred product for scuba divers but is designed for all water sports Shark Shield is based on a technology invented by the Natal Shark Board of South Africa Effective range is about 8 meters in diameter Deters sharks and does no lasting harm to the shark. Once the shark is out of the affected area, it no longer feels the effect of the electrical wave form Shark Shield is a three-dimensional electrical wave form which creates an unpleasant but harmless sensation to sharks When the shark comes into proximity of the electrical wave form it experiences non-damaging but uncontrollable muscular spasms in its snout, causing it to flee the area The closer the shark is to the Shark Shield field, the more spasms occur in the sharks' snouts The FREEDOM7 antenna has been designed to cause minimum of water resistance and drag on the user Shark Shield's unique wave form elliptical field only affects free swimming sharks and to a minor degree rays and skates Shark Shield allows you to hunt, photograph or just swim with all other marine animals roaming freely in their ocean settings The Shark Shield FREEDOM7 is a compact, versatile, and light weight personal shark deterrent system. It is the preferred product for scuba divers. It's designed for all water sports.