LNYMZD Silver Adjustable Ultrasonic Dog Whistle,Portable Whistle Pet Whistle Supersonic Whistle Dog Whistles for Pet Training，Training and Behavior Aids，Dog Whistles Training and Behavior Aids

ADJUSTABLE FREQUENCY: Features precise frequency control that can be customised to your dog's hearing sensitivity range for effective training ULTRASONIC DESIGN: Silent to human ears while producing clear ultrasonic frequencies that dogs can hear from a considerable distance PORTABLE CONSTRUCTION: Compact silver whistle with a lightweight design that easily attaches to keychains or lanyards for convenient carrying TRAINING TOOL: Perfect for obedience training, recall commands, and behaviour modification in both professional and home settings DURABLE MATERIAL: Constructed from high-quality metal for long-lasting performance and resistance to wear and tear