Upgraded Canine Barking Behavior Chip: Using the quality bark silent dog collar for small, medium or large dogs, in 95% of cases it will reduce (eliminate) the dog's barking. The dog whine collar has automatic performance of 7 safe stages of sound (beeps) and vibration. Take into account the 5% probability of no reaction. No crash, no damage: Upon noticing the movement of your dog's vocal cords, a warning beep followed by vibrations is produced if the barking continues. Your dog will quickly and easily associate them with his barking, making this the ideal human correction. Adjustable anti-bark belt - High-quality fabric belt with reflective stripes that is comfortably adaptable. Suitable for dogs from 11 to 110 pounds and 100% waterproof. Cut excess band with scissors, if necessary What you get in the package: 1 anti-bark devices, 1 adjustable nylon collars, 1 plastic covers, 1 4LR44 6v alkaline batteries, 1 user manual. Use the anti-bark collar and worry no more: Your dog will finally stop barking and allow you and your neighbors to enjoy quiet moments. The anti-bark collar will ensure no bark is detected by gently vibrating without shock until your dog stops.