Forget the dog whistle, you can now remote-control your dog to do whatever you want.
All you have to do is strap a backpack to the back of your canine and switch it on, and your doggy best friend will do all you ask. The backpack also has a GPS system and a radio modem which will let you know where your dog is. Lost posters are about to go extinct after this interesting gadget gets developed.
High-Tech Doggy Packs
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Control a Man (or Woman)
Gesture Activated Remote Controls
Historical Flying Toys
Fashionable Remote controls
Wi-Fi Remote Controls