The Petgentle Ultrasonic Anti Dog Barking Pet Trainer is a sleek black device made of ABS material, measuring 13.5x5.5cm. It emits ultrasonic waves to help train dogs to stop barking gently. This device is suitable for all breeds and sizes of dogs, making it a versatile tool for obedience training. Please note that batteries are not included with the product, and it is designed specifically for anti-barking purposes. Made in China, this pet trainer device features LED light technology for added effectiveness in training your furry companion.