Best I can tell, the bobber houses the transmitter, which connects to the lure via a thin wire. The lure is programmed to swim like a dying baitfish, and I'd be a liar if I didn't say it looks so real it's spooky. You can see a better action shot of it by clicking here. Per the creators, it takes 15 minutes to charge by USB, and swims for 3 hours. Now, I certainly have unanswered questions, like how does it stop itself from twisting the wire, and what pound test is that wire? Can I drop this in front of a 40-pound striper? Interestingly, while you might think such a gadget would cost hundreds, you can pre-order one for a mere $25. Go ahead and get you one, but don't blame me when 10 years from now they become self aware and fish out every body of water on their own.