Handheld Anti Barking Ultrasonic Device
I offer a real world demonstration of a handheld anti barking ultrasonic device in this video. The featured anti bark device is the size of a smaller flashlight, so it's compact enough to carry with you when you're out and about and want a device to repel other dogs. It's pretty effective to use for training your own dog, and may offer some help if you're dealing with obnoxious barking dogs next door to you. Check it out and you can find a link for this device in the comments section.