Easy Training - Dog whistle provides the easiest training experience of any dog training aid on the market.2 x Dog Training WhistleApplicationof Whistle: Training Dog, Cat, Parrot, , Bird, , Rabbits...Length of Whistle: 8cm for Pet Dog - Our Silent Whistle will not hurt your dog's ears when you training your dogs.Conveniently to Carry - It is small and lightweight, just 3.15 inches, you can put it on a key chain or pocket.Specification： Control Whistle - Dog whistles are very popular to train your dog without hurting your pet through shocks and other means.Length of Whistle with Keychain: 9cmANTI-LOSS & DOG WHISTLE - The lanyard feels great around your neck during your training session with your little puppy or grown up dog.Material: ABS + Stainless Steel PolyesterSize of Lanyard: 42 x1.5cm