Gerapets No Bark Collar Kit - Training Dog Collar, 2 Batteries, Clicker/Whistle & eBook - 7 Adjustable Sensitivity Levels of Warning Sounds & Mild Shock Modes - Safe & Suitable for 15-120 Lbs NO MORE BARKING! Stop your dogs incessant barking quickly with this complete kit. At Gerapets, we believe that every dog is our best friend and there is no need to cause injury in any way shape or form. Our product can safely be used for dogs between 15 to 120 pounds. 7 ADJUSTABLE SENSITIVITY LIMITS: Train your dog by warning sounds & levels of mild shock. Our intelligent collar gives you the flexibility to adjust the intensity of vibration with seven adjustable sensitivity levels to deliver a noticeable shock that stops their barking without injuring your pet. The collar is only triggered by your dog's barking and is not activated by other environmental noises EASY TO USE: Adjustable locking nylon collar with bark receiver, electrodes & included battery. Our product is almost completely automatic. Simply install the included 6-volt alkaline battery, adjust the strap to the size of your dog's neck and the collar automatically begins its work. You can easily adjust the sensitivity level on the collar with one-touch buttons and choose the large or small electrodes to ensure a secure, comfortable fit FREE CLICKER/WHISTLE, EXTRA BATTERY included plus an EBOOK of 100 Dog Training Tips to correctly train your canine 100% GUARANTEED! If you are not satisfied, contact us, & we will do our best to rectify the issue The more sensitive level you set, the easier it will be to trigger the collar. Its set to level 4 automatically when you install the battery.