☆ Final price reduction. Thank you for considering. Thank you for viewing. This is the "No Barking Boy" from KYPLAZA. Product Description: This device detects a dog's barking and uses harmless ultrasonic waves to gently train the dog, safe for both humans and dogs. It can be used regardless of the dog's size. You can adjust the sensitivity in 3 stages, so please adjust it according to the situation of your dog. Condition: Like new, only used for testing. Please note that the instruction manual and outer box show some damage and dirt. 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.