Simply press the button, and it starts automatically and stops by itself; opens jars of any shape and size. Safety warnings: The device and its accessories are not toys. Do not allow young children to play with the device; they could injure themselves, harm others, or damage the appliance. Keep the device and all its parts and accessories out of reach of young children. Product name: One Touch Automatic Jar Opener, Multi-functional Jar and Container Opener One touch of the button starts it automatically, and it stops on its own; opens jars of any shape and size. Safety Warnings: The device and its accessories are not toys. Do not allow young children to play with the device; they could injure themselves or others, or damage the device. Keep the device and all its parts and accessories out of reach of young children. Product Name: One Touch Automatic Jar Opener, Multi-functional Jar and Container Opener