Cool K-9 Evaporative Cooling Dog Reflective Safety Vest - Medium by K COOL [ANTI-BARK TRAINING WITH 7 PROGRESSIVE SENSITIVITY LEVELS] - Each time your dog barks, the collar activates a tone then a vibration. If the dog keeps barking, the tone and vibration progressively lasts longer and becomes more intense until the barking stops. [HUMANE PROTECTION MODE]  this bark collar will go into sleep mode for 1min if it activated 7 times within 40 seconds to prevent your dog from excessive beeps and vibrations; REFLECTIVE safety design, enhance visibility for your dog in dark or dimly lit areas, protect your dog [NO POINTY COMPONENTS FOR COMFORT FIT & SAFETY]  No need to worry about sharp metal prongs causing skin burn or irritation to your dogs neck after wearing it for a lengthy period. [DURABLE REFLECTIVE SLEEK DESIGN] - Even little dogs can get around, so our collar is made to last. The sensor and vibration unit is made from a solid piece of durable plastic and the collar has an adjustable strap made from comfortable high quality polyester webbing. [RECHARGEABLE & EASY TESTING]  Why waste money on replacing batteries. This collar has a long lasting built-in rechargeable battery that lasts up to 10 hours of continuous use. The provided DC-USB charging cable is included and power adapter is not required.