Gotrone Electric No Bark Collar - Training Anti Bark Collar For Dogs - Fits For All Dogs - Small, Medium And Large Dogs - Humane And Safe With A Full Shock Sensitivity Control - Free Clicker Included SUITABLE FOR YOUR LOVELY DOG! - Adjustable leather leash from 6 inches to 30 inches, which suits for different dogs: small, medium and large (not for huge dogs) ADJUST THE COLLAR WITH DIFFERENT LEVELS OF SENSITIVITY - there are 7 levels of sensitivity adjustment (1-7), by clicking "+" to raise it, and "-" to lower the sensitivity, the option made in order to be suitable for different dogs CHOOSE YOUR MODE! - there are 2 training modes: beeper and static shock, just choose the one you want or need. We include a free clicker as a gift! PERFECT FOR 15-120lbs - This product works perfect and most effective for 15-25lbs dogs, works great for larger dogs as well, do not use it on 8- lbs dogs. Best for pet owners, trainers, police and military. 100% SATISFATCION GUARANTEE - Your satisfaction with our products and service is our top priority. We let you buy with full confidence, and we are standing behind our products!