Uses vibration to interrupt the dog's barking. Durable and waterproof. Three color LED for good/low battery and test indicators. On/off position for longer battery life. Works well with deaf, sensitive or timid dogs. Dogs typically stop barking withing the first few days after wearing the collar. Easy to use, no programming required.
How it works:
"Does not work`"
I purchased two of these collars - one formy dog and one for my sister's dog. Worked only the first time my dog barked with it on now she just ignores the vibration.