The PetSafe Ultralight Sonic No Bark Dog Collar is the lightest bark collar available, weighs only 1 ounce! Great for even the smallest dogs. The PetSafe Ultralight Sonic Anti Bark Collar weighs only one ounce, so it can be worn by any size dog. The PetSafe Ultralight Sonic Bark Collar snaps right on to your pets existing collar so he doesn't have to wear a second one. The PetSafe Ultralight Sonic Bark Control 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.

PetSafe Ultralight Sonic No Bark Dog Collar Specs:

* 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