Tired of excessive barking? This ultrasonic anti-bark device helps train your dog to bark less – humanely! It's brand new, unbranded but functional. When the dog barks, it emits a high-frequency sound (inaudible to most humans) that interrupts the behavior. Effective range is about 5-10 meters (16-32 feet). Made from black ABS plastic, size: 137x55x25mm. Runs on a 9V battery (not included). Perfect for yards, homes, or even travel. Made in Mainland China. Not a shock collar – just sound-based correction. Give it a try if your pup needs a gentle reminder to keep quiet!