100% brand new and high quality, this product is mainly used to prevent dogs from tying it up when leaving the dog, it can be used as a training device. Train your dog by pressing the ultrasonic off button to teach your dog not to bark continuously or correct any other inappropriate activity Instructions: 1. Training dog: slide the function switch to the center and press the Change light beam button on the top of the product 2. Lead the dog: slide the function switch to the last site and aim at the crazy dog, press the beam button, the dog will run away 3. Lighting: slide the function switch to the first site, press the "BEAM" button, the machine can be used as a light .Features: Train all kinds of dogs, such as those used as pets, in police and for shepherds, expel fierce dogs effectively, and also c used as a torch at the usual time, the inte Three-function grade switch and beam button with a hand strap for easy to carry, easy to operate, the following conditions may lead bad effect of driving the dog: 1 your own dog. Because the dog knows that his owner will not harm him. 2. In noisy environments, such as the city center or the street. 3. A well-trained dog. 4. When the battery voltage is low. 5. The dog listens to too much ultrasound, it has been focused on it, it does not scare it. Attention: Do not emit ultrasonic waves to your ears directly! This can make people feel uncomfortable. I'd better not use training dog (medium) grade for lighting because the amount of current consumption in this grade is five times that of lighting-grade! Features: Powered By: 9V Battery (Not Included) Material: Plastic Size: Approx. 13x4x2.6cm/5.12x1.57x1.02'' Color: Yellow Quantity: 1 Pc Note: 1. Please allow 1-1 error 3cm due to manual measurement. 2. Due to the difference between different monitors, the image may not reflect the actual color of the item. Thanks! Package Includes: 1 x Dog Trainer Ultrasonic Repeller