【Like New】【Used for Testing Only】 Design with 3-level sensitivity adjustment to prevent nuisance barking. - Model Name: Bark Stopper - Function: Bark Prevention - Sensitivity Adjustment: 3-level adjustment (Low Power, Middle Power, High Power) - Effective Range: Approximately 4.5m (Low Power), Approximately 9m (Middle Power), Approximately 15m (High Power) - Size: Approximately 16.5cm x 16.5cm x 19.5cm Thank you for viewing. I have two dogs, and I purchased this last week to prevent nuisance barking. I used it for one day as a test, and it was effective for one dog, but not for the other, so I am selling it in the original box. It's practically new. Of course, there are no scratches or signs of use. - Batteries are included, and the power is turned off. - Japanese instruction manual is also included.