Features: Effectively Dog Bark Training - Our 2-in-1 ultrasonic anti-bark device provides a safer solution than other training tools for dog training and bark control. The anti bark device can effectively train your dogs to stop unwanted behaviors such as barking/digging/eating unsafe food/fighting or other unwanted behaviors. Safe and Works On All Sizes Dogs- The hearing frequency for dogs ranges 15HZ~120KHZ. Our ultrasonic bark control device can make ultrasonic sounds at 22~25KHZ(select 3 different frequency waves by button) which sound can grab the dog's attention but not hurt the hearing of humans(20HZ~20KHZ) and dogs. The barking control device can be applied to all-breed dogs and all size dogs. 16.4ft Control Range & Portable- Our handheld ultrasonic barking dog deterrent is ergonomically designed that comfortable to hold. The control range of bark deterrent is 16.4ft and comes with a portable strap. It can be used anywhere to train our own dogs or drive away unfriendly dogs we encounter on the road. Spot & LED Flashlight & Dog Whistle- Press and hold the second button to emit a spot that can play with the cat or dog. Click the bottom button at the bottom to turn on the LED flashlight that can be used as a secondary way to stop an approaching dog or be turned on and used to light go way home. Dog whistle can also be used to train and recall dogs. Easy Use & Rechargeable- Just simply press the top button, the bark deterrent will emit an ultrasonic sound to attract the dogs attention. Electronic Dog Repellent features installed 300mAh battery full charge in 2 hours for about 12 days of regular use. LED light(Red: low power; green: working). 430