Features:

• Waterproof, lightweight and durable
• Designed for a comfortable and correct fit.
• 5 intensity levels
• Works for small dogs.

Editor Reviews:

Product Description:
Waterproof, lightweight and durable. Designed for a comfortable and correct fit. 5 intensity levels set instantly with a button. Easy to see light confirms on/off. Bark Odometer counting feature reports correction activity. Bark sensor is internal and protected from damage. Choice of contact point length to assure proper contact for short and long coats. Battery-saving sleep mode. One replaceable lithium battery (included) battery will last a year in normal use.

Rating : - It actually works
This was a replacement for one that came off and the dogs buried. Really. I have two Sheltie/Aussy Sheppard mix dogs (~25 lbs) that would bark literally all night, every night. Nothing else worked. This was the last straw between keeping them and not. It works! They don't like them, but they respect them. Batteries last about 10-12 months. You have to remove them for walks, since jingling Dog Tags set them off. Otherwise, highly recommended.