In murky waters, "sharks rely heavily on their electro-receptors instead of their eyes to 'see' what's around them," according to the Sharkbanz website.
"As the shark approaches a person wearing Sharkbanz, magnetic waves coming from the band disrupt its electro-receptors and it quickly turns away. ... Once a shark comes near the band, it frequently leaves the area and does not return."
>> Watch Sharkbanz in action
Eric Hovland of the Florida Aquarium told WTSP that the product may actually work.
"When they're coming in close to a bait and there's a magnet there, it may make it difficult to get in on their object," he said.
Unfortunately, the repellent doesn't deter great white sharks.
"Great Whites are unique in that they are the only shark that acts as an ambush predator, attacking from a long distance at high speed," the Sharkbanz website says. "There is no effective way to prevent this type of ambush attack."
Learn more here or here.