This looks like a great product. Get one here: http://www.nichemall.net/index.php?route=product/product&product_id=50
Hard to believe you can hear this any further than you can pickup a bluetooth signal. If everything else was equal, maybe you could tell the direction of the sound better. This doesn't seem like a very impartial review. Think I'd rather have one of the GPS bases locators that calls your cell phone. ...Tiger
Yes there is, but I'm sorry to say I don't have a link for you off the top of my head. Next time I run into it, I'll send it to you and post it here. Might try Google.
Do you know the name of the GPS based product? I can't imagine a GPS based solution that costs $20 or less like this one above. I think we all could have used a little help finding a drone, helicopter or plane at least once and $20 seemed cheap to me for what it does.