>> you're sure? >> i'm positive. you can see how that does to it. i'll turn it down a little bit so we can talk. the frequency is 37.5. that's the standard frequency. why was that chosen? >> this is an actual pinger like in the plane, as i said. 37.5 kilohertz. that's a frequency that not many things in nature makes that frequency. therefore, it's going to be pretty quiet. the ocean is very noisy. sounds travels much better through water than air because it's a denser median. that means the sound can travel further. the downside is that everything that's making noise t in the ocean all piles up. >> again, this is the device. this is the little thing that they're so desperately searching for. >> tyiny little thing. it looks like a salt shaker. >> we've talked about this technology. we want to just show it to.