BarxBuddy is a SCAM! It has zero effect on my dog and the red laser light may be harmful to your pet's eyes. This junk product should be banned completely. DO NOT BUY THIS USELESS PRODUCT! IT IS CRYSTAL CLEAR WHY THIS COMPANY HAS A NO RETURN/NO REFUND POLICY IF THE BOX HAS BEEN OPENED. IT'S BECAUSE ONCE YOU OPEN THE BOX AND TRY IT, YOU FIND OUT IT DOES NOT WORK AND HAS ZERO EFFECT ON YOUR PET. HOW CONVENIENT!! WHAT A SCAM! NO REFUND POI User's recommendation: NEVER IN YOUR LIFETIME SHOULD YOU BUY A BARXBUDDY.