1. 3-IN-1 DOG BARK DETERRENT DEVICE (Includes battery): This versatile device effectively trains dogs, curbs excessive barking, and features a built-in flashlight. The ultrasonic bark control mechanism captures your dog's attention and discourages unwanted behaviors such as barking, digging, scratching, biting, or jumping on furniture. For optimal results, use daily for at least one week. 2. SAFE AND EFFECTIVE FREQUENCIES: The device emits two frequencies—25kHz fixed and 30kHz variable—inaudible to humans but perceptible to dogs. It operates without shocks, vibrations, or loud noises, ensuring it is harmless and won’t affect your dog's hearing or skin. 3. MORE EFFECTIVE THAN TRADITIONAL BARK COLLARS: This bark deterrent device offers a safe alternative to painful electric shock collars. It employs a gentle ultrasonic method with an automatic shut-off feature, promoting a peaceful environment for you and your neighbors while encouraging good behavior in your dog. 4. DETER BAD TRAINING HABITS: Featuring dual speakers that reach up to 33 feet, this device is effective both indoors and outdoors. Use it to train your dog in various settings or carry it on walks to deter aggressive or unfriendly dogs. The combination of a high-frequency flashlight and ultrasonic sound enhances its effectiveness, especially in low-light conditions. 5. PRACTICAL APPLICATIONS: Ideal for home training sessions, walks in the park, or visits to pet-friendly events, this device helps maintain a calm atmosphere while reinforcing positive behavior in your dog. Its portability and dual functions make it a valuable tool for any dog owner.