Size: whistle 8*0.7cm; lanyard 49cm Stop Dog Barking: When your dog or a nearby dog is barking, use the dog whistle to emit an ultrasonic frequency that helps capture the dog's attention and discourage barking Absolute Safety: The dog whistle is constructed from 304 stainless steel. It emits ultrasound frequencies that attract dogs without causing harm to their hearing or affecting their health Remote Control: Ultrasonic waves can travel up to 1000 meters. After proper training, dogs can respond to commands such as sit, stay, lie down, or come, even when out of sight. Use the whistle to call your dog without raising your voice For All Dogs: This silent dog whistle is suitable for all dog breeds, including Labrador, Scottish Terrier, Golden Retriever, German Shepherd, and Beagle. Maintain effective communication with your dog during training or outdoor activities