Introductions: 1. Turn clockwise to 60. 2. Turn counter-clockwise to the number of minutes required. 3. A bell will ring when all the minutes have elapsed. Advantage: 1. ROHS Certification. 2. Many styles to choose from. 3. Manufactory price and high quality. 4. Rich experience for export. 5. Located in the port city of Ningbo. 6. We will reply in the shortest time . 7. OEM&ODM are welcome.