Feature: 1. Ultrasonic Safe And Effective Anti Barking: Ultrasonic dog training anti barking equipment is safe and effective, and will not cause harm to your pet. 2. Indicator Light Display: white and green lights flashing work instructions, different gears and different lights, the operation is more convenient and quick. 3. Comfortable And High Quality Material: The ultrasonic dog trainer adopts silicone parts on the left and right sides, making it more comfortable to handle. 4. Battery Power And Strong Sound Waves: 4 AAA batteries are used, and the sound waves emitted are stronger than ordinary models. 5. Adjustable Gear Position: This ultrasonic bark control adopts toggle switch for high and low gear settings, one key transmission of ultrasonic waves. Specification: Item Type: Ultrasonic Dog Training Device Material: Plastic, Silicone Purpose: Pet Training, Barking Control Battery Model And Quantity: 4 x AAA Dry Battery (Delivered without Battery). Package List: 1 x Trainer1 x Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.