Clicker and Whistle 2 in 1: Simply press the button or whistle to hear a clear sound. The large buttons click easily, and the whistle is clear and loud. It can be used to train your dog's basic obedience and correct bad behaviors. Many people call it the "happy training method." Ideal for training pets safely. Simple & Safety: Unlike expensive electric shock dog products, our products do not contain electricity. They will not give the dog or owner an electric shock. The sound is stable. The button is easy to identify. The stainless steel shrapnel can be tested 10,000 times under pressure and will not deform. Durable and will not rust. Comfortable Design: Made of ABS plastic and a stainless steel ring, it will not rust and is durable. The matte surface and non-slip handle are easy to hold. The 17.4*3.2cm size is suitable for any palm size and is easy to control. Thanks to the keyring, you can take it anywhere. No worry about losing it. Advantages of the collection: 3 different colors on the packaging (black, red, and blue) with a keyring for convenient carrying and storage. You can keep it in your keychain or add a string to hang it around your neck so you can easily reach it when you need to train your pet. Versatile Use: The clicker can train not only dogs, but also cats, birds, chickens, sheep, and even mice. It is your essential training tool for sensitive pets. You will have a happy and trustworthy communication tool with your pet. All Diyife products are backed by a 12-month money-back or new replacement guarantee.