It seems you're describing a product called the "Gentle Chaser Pet Trainer." This device appears to be designed to address aggressive animal behavior and to deter dogs from barking. It likely utilizes LED lights and sonic technology for training purposes. The sonic component may emit sounds that are unpleasant to dogs, serving as a deterrent. However, it's important to note that the effectiveness of such devices can vary depending on the individual dog and the specific circumstances.
If you're considering purchasing this product, it's advisable to research reviews and possibly consult with a professional trainer or veterinarian to ensure it aligns with your goals and the needs of your pet. Additionally, always use such tools with care and consideration for the well-being of the animals involved.