Features 1. Stop Dog Barking: When your dog or a neighbor's dog keeps barking, gently blow the dog whistle. The ultrasonic frequency emitted by the whistle can effectively capture the dog's attention and help stop unwanted barking. 2. Adjustable Frequencies: Different dogs respond to different frequencies. This dog training whistle features an adjustable screw mechanism that allows you to fine-tune the frequency. Observe your dog's reaction at each setting to find the most effective one. 3. Safe Design: Made from 304 stainless steel, this whistle is durable and safe for dogs. The ultrasonic sound attracts a dog's attention without causing hearing damage or health issues. 4. Remote Training Capability: Ultrasonic sound can travel up to 1000 meters. With proper training, your dog can respond to commands such as Sit, Paw, Lay Down, Up, and Come, even when out of sight. Use the whistle to call your dog without shouting. 5. Suitable for All Breeds: This silent dog whistle works effectively with all dog breeds, including Labrador, Golden Retriever, German Shepherd, Beagle, and other common breeds. Stay connected with your dog at any time. Specifications Material: Stainless steel Color: Black, White Size: 8 x 1 cm Weight: 27 g Package Includes: 2x Dog Whistle 2x Lanyards