Sonic Bark Collar

The Ultralight Sonic Bark Collar weighs only one ounce, so it can be worn by any size dog. The Sonic Bark Collar snaps right on to your pets existing collar so he doesn't have to wear a second collar.
The Sonic Bark Collar's adjustable sensitivity levels allows you to customize it for your dog's unique bark. To deter barking, it emits a loud sound, similar to a smoke detector that startles your dog, disrupting his barking and discouraging him from continuing. While very effective, it is perfectly harmless.

Exclusive Features:

• At 1.9 cubic inches, it is by far the smallest you can buy
  
• Attaches to your dog's existing collar - (one inch width or less.) No need for your dog to wear a second collar
  
• Adjustable sensitivity levels so you can be sure to detect your dogs bark every time
  
• Uses loud but harmless audible sound to deter barking
  
• Lifetime Warranty