The Petsafe Bark Collar PBC-102 is a very light-weight collar that can be used on dogs 8 pounds and greater.  This model has six levels of static correction.  This bark collar uses a vibration sensor that detects when your pet is barking by the vibration of his or her vocal cords and administering the static correction.  Perfect for most average temperament dogs.


Features
Recommended for dogs 8 pounds and greater
Six settings for correction (Three modes, six levels for each mode)
Progressive correction feature increases correction to next strongest level if dog continues to bark
Safety time out will shut off the correction for 3 minutes if the dog barks more than 15 times in 30 seconds
Sensor probe cannot be removed or adjusted
Cannot attach leash to collar
Should not be worn with other collars as they may set the collar off
Correction that automatically adjust to your dog's temperament
The most reliable bark detection technology available
Low battery indicator
Not recommended to use for more than 8 hours at a time
Manual and video included

Collar Specifications
Height: 1"
Width: 2"
Depth: .75"
Weight: 1.5 oz
One black plastic sensor probe, center
Uses PetSafe RFA-67