Scientific training methods: The training clicker emits a clear sound after pressing the button. Large knob for easy click and powerful sound. The clicker training method is now more and more popular, you don't need to beat or do the voice yourself. It can let your pets learn a variety of small tricks and not easy to forget. Durable and Safe: Unlike expensive electric shock training products, dog clickers do not contain of electricity. The shape of the water droplets in the hands is very comfortable. Stainless steel 10,000 times the pressure will not warp or rust. Pack of 4: 4 different colors (black, yellow, red and blue). Convenient to carry and store. You can put it in the car, bag and pocket to easily get it when you need to train your pets. Comfortable design: ABS plastic material + stainless steel ring does not does not rust and is durable, the matte and non-slip surface is easy to hold. Size 6 x 4 x 2cm, water droplet shape, suitable for all palm sizes and easy to control. Elastic wrist strap, so you won't fall off during training. Wide ApplicationsThe clicker can not only train dogs, but also train cats, birds, sheep and even mice. It is your essential sensitive training tool for your pet. You will have a happy and reliable communication tool with your pet Color: black + blue + red + yellow Quantity: 4 pieces Note: The data is all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be a certain difference of color, the actual object received shall prevail.