Here is another ultrasonic gadget that turns your dog to stop barking. The VOSOV Dog Barking Deterrent Tool has a range of 30ft. It emits a 25kHz sound to get the job done. You can use this device on dogs of all sizes but you shouldn’t try it on ill, old, and under 6-month puppies.
This gadget can be charged via USB. It is compact enough to fit in your pocket. You can find out more about it here.