Pet Command - Pet Training Device & Flashlight by Collections Etc Safe, effective, easy-to-use pet trainer that helps stop bad behavior. Device emits a high-frequency, ultrasonic tone that only dogs and cats can hear. Simply point it at your pet, press the button, and the harmless pitch conditions your dog to respond to verbal commands. For a stricter command, press Bark Control. Use the clicker button to provide an audible cue to help train your dog. Effective up to 20-ft. away. Plus, it has a built-in LED flashlight for nighttime walks. Requires 3 AA batteries (sold separately). Plastic. Measures 9 3/4"L x 7 1/4"W x 5 1/2"H.