BARK CONTROLLER AND TRAINING DEVICES TWO IN ONE : Two applications. Not only stop your dog’s annoying barking but also can be used as a training aid. You can correct their unwanted behavior such as jumping up, digging, chasing,chewing and trash raiding.The ultrasonic dog controller can effectively train your dogs to be obedient. HUMANE AND NOHARM - We know you love your best friend but their barking is an issue especially when they disturb your neighbors or interrupt your night sleeping. With the help of Pet-Friendly ultrasonic technology, training without pain. Our barking control is humane and harmless. NO vibration or static shock. It is a ideal gift which make the dog obedient, and do not harm the dog's body. EASY TO USE : Just only push of a button then it emits an ultrasonic sound which can only be heard by the dog. The ultrasonic sound frequency is 25KHZ for maximum and effective range is 5 meters. (16.4ft) It produces a high-pitched ultrasonic sound that is irksome to dogs and at the same time it is soundless to the human. It is fully harmless and safe to humans and dogs. SMALL AND LIGHTWEIGHT : It is Small and lightweight and Fit perfectly in your pocket, designed to be convenient to carry around with you. Suitable for indoor use and walking the dog outdoors as well. Made by high performance ABS material with Eco-Friendly design and waterproof. CONVENIENCE : It is Convenience with LED light indicator to show green if the device is on working and red when low battery. Operates on 4 AAA batteries (not included), Adjustable wrist strap included for easy carrying. Pet-Friendly Ultrasonic Technology is Safe and Effective - This product is carefully developed and tested with professional trainers to ensure safe and effective results.