Dog Ultrasonic Bark Control Device Upgraded Digital Bark Control Outdoor Dog Bark Control Sound Bark Control Quiet Bark Control Stop Barking. Features: Suitable for Most Dogs: This mini bark suppressor uses high-frequency sound that reduces excessive barking from dogs within earshot; For dogs 6 months and older UP TO 15 M / 50 FEET REACH. Without the need for a traditional collar, it is safe for most types of dogs. Built with the highest quality to ensure long term use; it is waterproof and durable to withstand all weather conditions; This makes it a great outdoor bark control for dogs. LCD display anti-bark control device: Latest upgrade version, LCD display anti-bark control device, in the old version of the device We can't judge whether the ULTRASONIC BARK CONTROL is working or not, but we have an LCD screen to clearly see whether it is working or not and the battery. Voice Recognition Intelligent: Our anti-bark -Control device Configures an intelligent voice recognition system,