[How to use] - INSTRUCTIONS1. when you open the box, the default white sheet position is at time "0". 2. To start the time, turn clockwise and set the position of the leaves to 55. 3.You are now ready to set your time by turning counter-clockwise. (For example, for 15min, turn counterclockwise and set the leaf position to 15.) 4.Everything is set after 15 minutes, the timer will ring the bell. Note: You must follow step 2 for the timer to work. Timers are mechanical. No batteries needed. [CLOSEST HELP] - When you are extremely busy in the kitchen, this timer will remind you at any time. You don't have to worry about dried boiled water and burnt dishes any more. [MULTI-USE] - Not only for kitchen, but also for study, family, home life, home, increase study efficiency. [FEATURE] - Creative modeling. Clear calibration. Stable base.