Brief Description:The ultimate dog training systemFour functions: Bark control,training,clicker sound and flashlight;Features:* The ultimate dog training system;* Four functions: Bark control,training,clicker sound and flashlight;* 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.