The Sharkbanz 2 uses powerful magnets to confuse sharks’ senses and make it far less likely the shark will attack you. Sharks can detect electromagnetic fields, and the Sharkbanz “provides a sudden sensation that is thousands of times stronger than the signal produced by anything in a shark’s normal food chain.” Essentially, the bracelet emits electromagnetic waves that confuse the shark. That means the shark will want to move away from the person wearing the bracelet.
Since it’s a magnet, it doesn’t require batteries or any other power source, and it will last for years. If you regularly find yourself swimming in the ocean, it might be a good idea to make sure you’re not at risk of having a dangerous encounter with a shark. It works up to 300ft down, it’s light and it comes with a magnetic-shielded box for safe storage.