Purina Friskies Indoor Adventures Crunchy, 4-Ounce (Pack of 5) ADVANCE MICROPROCESSOR CONTROLLED: with 6 levels of sensitivity adjustment, sound and vibration will only be triggered by your dog. The new sensor will make you dog feel comfortable as more as possible. EFFECTIVE FROM 5LBS TO 150 LBS DOGS: The collar which is easily to adjustable is made from nylon strap with high quality. This makes JANNIX no bark collar is fit for all size dogs from the small 5lbs dog to great 150lbs HUMANE, PAINLESS TONE AND VIBRATION: with the continuously beep sound and vibration when your dog starts barking, he/she will soon learned that in order to stop unpleasant noise and the vibration, he/she will have to stop barking without using any pain or shock. WATER RESISTANCE LED CLIP GIFT: JENNIK would love to give buyers a Spot Dog Light which provides more safety and visibility at night for your canine friend. The Bark Control Collar and the Led Clip will become the best gift for your beloved dog. TIP FOR USERS: In order to have the best result from JANNIK collar, you should check the battery weekly and take notice because sometime your dog's barking is due to thieves, dangers or even natural disasters.