Ocean Guardian FREEDOM7 | Powered by Shark Shield Technology | Diving | Spearfishing | Kayaking | Scuba Diving | Proven Shark Deterrent | Dive Equipment SCIENTIFICALLY PROVEN  The worlds only scientifically proven and independently tested electrical shark deterrent. Proven to deter great whites. HOW IT WORKS  Capable of generating an electric field via the trailing antenna thats attached to a power module while being worn on your ankle, this shark deterrent can help reduce the risk of an unwanted shark encounter when youre in water as deep as 50 meters (164 feet). UP TO 6 HOURS PROTECTION  Used by the US & Australian Navies, and included as a mandated safety equipment in some industries, this shark protection gear comes equipped with a lithium rechargeable battery thats good for 1000 charge cycles, with an estimated six-hour battery life per charge. COMFORTABLE & LIGHTWEIGHT  Featuring a lightweight design and neoprene Velcro pouch, our electric repellant comes equipped with a lithium rechargeable battery thats good for 1000 charge cycles, with an estimated six-hour battery life per charge. Each package comes with power adaptors for Australia, USA, Europe, and Asia. 30-DAY MONEY BACK GUARANTEE  We are so confident in the quality of our anti shark device that we back them with a 100% 30-day money-back guarantee. We wont hesitate to give your money back if the shark diving protection gear doesnt meet your expectations.