Selling point: 1. Ultrasonic dog trainer anti-barking equipment is a safe and effective training aid. Ultrasound can tame your dog immediately, stop barking, and control other unnecessary behaviors, such as biting, fighting, digging and aggressive barking. . 2. The ultrasonic dog bark deterrent function emits a high tone of 20 kHz when activated, which will not affect humans, but can fully attract the attention of dogs. 3. The ultrasonic dog training device has an LED flashlight to attract the dog's attention and help train those dogs with poor visual response. You can use LED lights when walking your dog in the dark, or attract attention when the dog is far away from you. 4. Using sturdy ABS plastic material, sturdy, impact-resistant, lightweight ABS plastic shell, and equipped with a wrist strap made of durable nylon, easy to grasp and durable. 5. Hand-held anti-bark training equipment is used for strict indoor/outdoor training procedures, suitable for any dog species, and comes with an instruction manual to provide you with instructions on how to control the flashlight, train and stop excessive barking. The batteries are all 9v square batteries (not included in delivery) Double head: Product size: 13.7*5.5*2.5cm Product weight: 56g Color box weight: 72g Color box size: 14.1*6*3.5cm Color box box gauge: 59*38*34