The timer is a mechanical timer, so it needs to be rotated clockwise to 60 minutes before use! Then turn it counterclockwise to the time scale that needs to be set. Please follow the instructions, otherwise there will be no sound. MECHANICAL TIMER No power supply, manual winding, clear sound. The manual magnetic Timer DO NOT need to install or replace the battery, Made of high-quality metal and plastic, strong and durable. Clear scale helps you set the time clearly in minutes. MULTI-FUNCTION MANUAL TIMER High-decibel ringtone warning, accurate cooking time. The bell will automatically ring when cooking timer magnet rotates to setting time for a mechanical drive. Enjoys a loud ring, which can easily be heard from across theroom. WIND UP TIMER The premium stainless steel timer can count up to 60 minutes, which can prevent your favorite dishes from burning. This is a fun and creative way of timing. The egg timer can be easily placed on your countertop or windowsill. MANAGE YOUR TIME Mechanical kitchen timer can help you to learn time management, especially for cooking,baking,brush teeth,reading, learning, running, yoga,mask beauty, coff