Has anyone used this new device yet? It sounds like a very useful product. Bark in and tell me your experiences with it!

I found the Viatek Bark Stop on PetGadget.com.

Viatek Bark Stop Portable - Handheld Dog Trainer

The Viatek Bark Stop Portable handheld dog trainer is a complete training and personal siren system. This unit gives you a tool for coaching dogs as well as a load sounding siren for personal protection. At the push of a button the Bark Stop Portable transmits a silent ultrasonic sound that only dogs can hear. Another feature is the personal siren, which sets off a high decibel sound - allowing joggers, walkers, mailmen, delivery people, and outdoor enthusiasts a sense of safety.

For additional help coaching your dog, push the ultrasonic button. A spurt of ultrasound will help coach your dog to control their barking, jumping on visitors and furniture. This dog instructor rest comfortably in the palm of your hand or you can hang it on the wrist. Bark Stop Portable also includes a handy built-in Super-Bright flashlight.

Push the button to help coach your dog to behave better and train the pet to stay off of furniture, to stop barking at the door and any other training situation.

Features:

• Portable Bark Stop will train your dog anywhere and anytime

• Uses 1-9-Volt battery (not included)

• Works on cats too

• Pull-switch activates a high decibel siren

• Built-in power flashlight with ON/OFF push button

• Comfortable and sporty design