Dog Bark Collar Ultrasonic Bark Control - Static Shock Anti Bark Dog Collar with 7 Sensitivity Levels and Adjustable Strip for Medium Large Dogs Barking Control Training SAFTY STOP BARKING - CE and RoHS proved bark training collar is a Humane collar harmless for your dog when barking,warning sounds and harmless static stimulus,effective and easy to use,it will stop working for 1 minute should your dog continue to bark... NEW 3RD GENERATION - 7 levels of sensitivity adjustment by "+" and "-" buttons, to be suitable for different dog,2 training modes: beeper and static vibration.More energy saving, compared to the Basic version, save 30%... STOP BARKING FAST - Replaceable 6-volt, Adjustable sensitivity button from low to high to manual contorl your dog's barking under different condition... EASY TO USE - Adjustable nylon tape from 6"-30" in dog's throat,Easy air blowing method to test the anti bark collar. NOTE - Don't encourage you to use it for puppy, especially below 8 lbs, choice for pet owners, trainers, police, military , Generally recommend for 15-120lbs dogs. Waterproof for daily use and please read the user's manual carefully before put it on your dog. Adjustable, durable and comfortable nylon collar Automatic anti bark collar Safe training device Sensitivity control levels: 7 sensitivity levels adjustment by &#034;+&#034; and &#034;-&#034; buttons for different size of dogs and specific environments Auto protection mode to avoid over stimulating the dog 1 x No bark receiver 1 x Adjustable nylon collar 1 x 6V battery 1 x Test light 2 x Pairs of test probes 1 x Use manual