1. Dog Bark Deterrent Device with Three Ultrasonic Emitters The 2-in-1 ultrasonic dog trainer is designed for effective dog training and barking control. It features three ultrasonic emitters that provide sound from multiple angles, ensuring your dog's attention is captured for quicker training results. This device helps curb unwanted behaviors such as excessive barking, digging, chewing, biting, and climbing on furniture. 2. Four Training Modes with Two Ultrasonic Frequencies This anti-barking device offers four modes: flashbang with 3X ultrasonic emission, beep mode, lighting mode, and automatic barking mode. It utilizes two ultrasonic frequencies: a fixed 25KHZ and a variable range of 20-30KHZ, which are inaudible to humans yet effective for dogs of all sizes. The variable frequency activates when the device automatically adjusts during the lowest gear to stop barking. 3. Multi-Function and User-Friendly Not only does this device train your dog effectively, but it also acts as a deterrent against other dogs approaching you while walking, jogging, or biking, ensuring your safety and your dog’s comfort. The built-in flashlight is beneficial for nighttime training sessions and helps in capturing your dog's attention during exercises. 4. Extended Control Distance and Quick Charging With a 50-foot control range, this dog training device is ideal for both indoor and outdoor use. It fully charges in just 2 hours, providing up to 60 days of use on a single charge. Spend more time training and less time worrying about battery life. Use scenarios: - Walking in the park and deterring other dogs from approaching your space. - Training your dog at home to reduce unwanted barking and destructive behaviors. - Conducting nighttime training in your yard with the built-in flashlight feature.