Thank you for viewing. This is the "No Barking KUN" from KYPLAZA. Product Description: This device detects a dog's barking and uses harmless ultrasonic sound to gently train the dog, safe for both humans and dogs. It can be used regardless of the dog's size. The sensitivity can be adjusted in 3 stages, so please adjust it according to your dog's situation. Condition: Like new, only used for testing. Please note that the instruction manual and outer box may have some damage or stains. I have confirmed that it works properly before listing. (Batteries are not included due to shipping restrictions.) Please refrain from purchasing if you are concerned about minor details, as this item has been handled by someone else.