New And Never Use. Local pickup or Ship to You. Important safety information: 1. Do not use this product on dogs less than 8 pounds or less than 6 months old. Recommend size range from 8lbs to 120lbs. 2. Do not use on strong dogs, do not use this product to try to correct the behavior of strong dogs. 3. Reposition the collar on the dog's neck every 1 or 2 hours. Avoid leaving this collar on the dog for more than 12 hours per day.  4. Check the contact point between the dog's neck and the product daily. If you find any skin problems, stop using this product immediately. 5. The strap should be adjusted so that two finger can fit comfortably between it and your dog's neck. When you've determined the desired collar length, cut the excess with scissors and light the end with a light flame to stop the threads from unraveling. 6. Never connect a leash to the bark collar as it will cause excessive pressure on the contacts. 7. Regularly clean the dog's neck, screws and silicone cover every week. 8. According to the actual environment, adjust the sensitivity appropriately to achieve the best use of the product. 9. For better protection of dog skin, please use silicone sleeve.