Ultrasonic Dog Bark Control Device Upgraded Digital Bark Control Outdoor Dog Bark Control Sound Bark Control Silent Bark Control Stop Barking. Features: Suitable for Most Dogs: This mini bark suppressant uses a high-frequency sound that reduces excessive dog barking within earshot; For dogs 6 months and up REACHES UP TO 15M/50FT. Without the need for a traditional collar, it is safe for most dogs. Built with the highest quality to ensure long-term use; It is waterproof and durable to withstand all weather conditions; This makes it an excellent bark control for outdoor dogs. LCD Screen Anti-Barking Device: Latest upgraded version, LCD screen anti-barking device, in the previous version of the device we can't judge whether the ULTRASONIC BARK CONTROL works or not, but we have a LCD screen to clearly see whether it works or not and the battery. Intelligent Voice Recognition: Our anti-bark control device Sets an intelligent control Voice Recognition system, the system intelligently