2 Pack Dog Whistle To Stop Barking Professional- Adjustable Dog Training Whistle Features: 1. Teaching your dog to follow your commands 2. Pet training whistle suitable for all kinds of family pet dog 3. Small and lightweight, just 3.14 inches, you can put it on a key chain or pocket 4. Our Silent Whistle will not hurt your dog's ears when you training your dogs 5. The lanyard feels great around your neck during your training session with your little puppy or grown up dog NOTICE: It requires multiple training for your dog to listen to your commands Please be patient Specification: Material: ABS + Stainless Steel Polyester Length of Whistle: 8cm Length of Whistle with Keychain: 9cm Size of Lanyard: 42 x1.5cm Package Include: 2 xDog Training Whistle Size Label Size Bust Waist Length Height Label: Yes