Ultrasonic device that reacts to a dog's barking and suppresses nuisance barking. - Brand: KYPLAZA - Type: Ultrasonic Anti-Bark Device - Function: Emits ultrasonic waves in response to a dog's barking - Compatible breeds: Large dogs, medium-sized dogs, small dogs - Design: Lantern-shaped with a roof - Country of manufacture: MADE IN PRC The device has only been used for a few days, so it's in good condition. While individual results may vary, please give it a try if you're struggling with nuisance barking. Thank you for looking.