How to use: Turn the egg timer clockwise to 55minutes, and then turn it counterclockwise to the desired time, such as 20 minutes. Then the timer will sound after 20 minutes. 80 decibels of comfort: 80 decibels can provide comfortable and clear sound for your ears. Please use it in a quiet indoor environment, you will hear clear sound. Note: Do not use it in a noisy environment, otherwise the sound will be very small. Shape design: The egg shape design is like a lovely craft. The stainless steel case is really sturdy, making the timer sturdy and durable. Product function: This is a mechanically driven timer. No battery, practical and economical design. Longer time range: 55 minutes can almost meet all your cooking time requirements.