A dog training whistle can be an effective tool for teaching your dog to follow your commands, such as calling him to you, sitting or going in a new direction. Here we provide you with a dog training whistle. The whistle can produce an ultra-sonic sound that is easier for dogs to hear. It takes a little bit of time, patience and practice, but your dog will learn to obey you through various whistle commands. This unique training aid combines two of the most popular dog training tools: a clicker and a whistle with a free lanyard. Specifications: Color: Black Whistle Material: Copper Clicker Material: ABS + Stainless Steel Lanyard Material: Polyester Length of Whistle: 7.8cm / 3.07in Length of Whistle with Keychain: 9cm / 3.54in Diameter of Whistle: 0.7cm / 0.28in Size of Pet Training Clicker: 6.5 * 3.5 * 2cm / 2.56 * 1.38 * 0.79in Size of Lanyard: 49 * 1.6cm / 19.29 * 0.63in Applicationof Whistle: Training Dog, Cat, Parrot, Eagle, Bird, Pigeon, Rabbits... Applicationof Clicker: Training Dog, Cat, Horse, Bird, Fish, Rabbits, Elephant... Whistle Weight: 16g / 0.56oz Clicker Weight: 15.8g / 0.56oz Package Size: Approx. 13 * 11 * 3cm / 5.12 * 4.33 * 1.18in Package Weight: Approx. 48.1g / 1.69oz Note: Adjust the length of the copper dog whistle by rotating the whistle to change the frequency of the whistle and choose the best frequency for your dog. Package List: 1 * Dog Training Whistle 1 * Pet Training Clicker 1 * Lanyard 1 * User Manual