There are 6 progressive correction levels, so if the dog barks again within 30 seconds, the next shock will be stronger, though not too strong for small or timid dogs. For safety, if the dog barks 15 times in less than 50 seconds, the collar shuts off automatically for a period of 3 minutes.

This best-selling, lightweight Petsafe collar uses a simple vibration sensor to detect your dog's barking. The safe and gentle stimulation level automatically increases if your dog's barking continues...

Innotek Automatic No-Bark Collars BC-200 Rechargeable Automatically stops your dog's annoying barking. The auto-set feature makes this collar incredibly easy-to-use, with no external controls or settings to hassle with...