✅ SAFE & HUMANE - We know you love your best friend but their barking is an issue. So our POP VIEW no bark collar is a great way of training using only sound and vibration, and is safe to wear inside and out complying to the highest safety standards. ✅ PROGRESSIVE TRAINING - To prevent stress the anti bark mechanism is delivered through 7 progressive levels of sound and vibration. This ensures that your dog receives the minimum amount of stimulation required to prevent barking. ✅ SENSITIVITY ADJUSTMENT - You can control the level of barking required to activate the collar allowing you to find the perfect setting for your dog. Your dog's wellbeing is our number one priority and we have ensured that this collar is packed with features allowing you to tailor it for your dog's needs ✅ SUITABLE FOR ALL DOG SIZES: Ideal for dog breeds weighing from 11 to 120 lbs or neck size 7 - 21 inches. You can according your dog necksize to adjust the suitable length.will not be a burden to your dog ✅ CONTENTS & RECOMMENDATIONS: Included for your stop barking collar is 6 volt battery * 2, 1 set of short screw caps, 1 set of long screw caps, 1 bark collar, and instruction Manual. Remove battery when not in use to save battery life.