Dog Silencer; Pet Trainer - This Dog Bark Deterrent Devices provide dog bark control and stop actions like digging, fighting, chewing furniture, eating unsafe foods, and other unwanted behaviors. Its a convenient and portable dog barking silencer Works On All Size Dogs - The ultrasonic bark control device creates an ultrasonic sound within the dogs hearing range of 15HZ to 120KHZ, and since average human hearing range is 20HZ - 20KHZ, the sound safely grabs your dogs attention and you won't hear it. Handheld & Portable - Since our antibark device for dogs is handheld, it can be used anywhere to train your dog: at home, the park, in your car. It also stops other dogs from approaching you while jogging, walking, or cycling. LED Flashlight With Multi Settings - More than just a barking dog deterrent, a super bright flashlight is included and can be used as a secondary way to stop an approaching dog. Holding down the button will not only emit an ultrasonic sound, but it will also quickly LED flash the bright LEDs and stop a dogs behavior. The bright flashlight can also be turned on and used to light your way home. Safe And Easy To Use - Our bark stopper anti bark device for dogs comes with a wrist strap and fits comfortably in your hand or pocket. One button to turn it on and off, and a 2nd button to select if you want just a flashlight or flashing deterrent with Ultrasonic sound. Completely safe to use on your dog. A great alternative to dog training clickers for pet training.