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.