Feature: 1. Material: The dog whistle is made of stainless steel and plastic, which will not rust and is strong and durable. 2. Ultrasonic trainingwhistle: Our dog whistle can be adjusted to output a variety of different frequencies of sound can reliably stop your dog from barking and teach your dog to obey many commands. 3. Comfortable: Our lanyards are super soft fabric lanyards and the whistle fits comfortably around your neck or in your hand. 4. Small and portable: This dog whistle is so small that you can take it with you wherever you go and it doesn\u0027t take up any space. 5. Lost proof: The lanyard is designed to allow you to hang the dog whistle around your neck so it won\u0027t get lost due to the small size of the dog whistle. 6. Easy to use: By adjusting the nut and regulating lever to sound at different frequencies, you observe your dog\u0027s reaction to any sound for a better workout. 7. Application: This dog whistle is suitable for Border Collies, Poodles, German Shepherds, Bulldogs, Rottweilers, Dachshunds, Huskies, etc. Specification: Features: Material: The dog whistle is made of stainless steel and plastic, which will not rust and is strong and durable. Ultrasonic trainingwhistle: Our dog whistle can be adjusted to output a variety of different frequencies of sound can reliably stop your dog from barking and teach your dog to obey many commands. Comfortable: Our lanyards are super soft fabric lanyards and the whistle fits comfortably around your neck or in your hand. Small and portable: This dog whistle is so small that you can take it with you wherever you go and it doesn't take up any space. Lost proof: The lanyard is designed to allow you to hang the dog whistle around your neck so it won't get lost due to the small size of the dog whistle. Easy to use: By adjusting the nut and regulating lever to sound at different frequencies, you observe your dog's reaction to any sound for a better workout. Application: This dog whistle is suitable for Border Collies, Poodles, German Shepherds, Bulldogs, Rottweilers, Dachshunds, Huskies, etc. Specifications: Color: black\blue\red\（optional） Material: stainless steel + plastic Product size: Total length: 9cm Flute: 8cm Lanyard folded：42*1.5cm Package size: 10*3*3cm Package weight: 25g Package List: 1 * Dog Whistle(with Lanyard) Package List: 1 * Dog Whistle(with Lanyard)