OxGord Stop Dog Barking Ultrasonic Anti Bark Off Limiter Birdhouse Box Silencer Controller Device for Pets REDUCE THE NOISE: Control your dog's barking and reduce the noise MODES: The bark control comes with four different levels, including a low-battery indicator. TRAIN: Use this as part of your training to make your dog more obedient. BATTERY POWERED: LED indicator powered by a 9-volt battery (battery not included). Average battery life is 2 months Made by Paws & Pals, an OxGord brand