Featuring mechanical design, this timer can operate and ring with no battery required. Magnetic design enables this timer to be firmly attached to the metal surface to bring you convenience. It is the timer that can be a good kitchen helper to help you control the cooking time and also be used to manage your sturdy or working time to improve efficiency. It is constructed of ABS material. The length of this product is 8.3cm, the width is 6.7cm and the height is 2.5cm. It is suitable for cooking, baking, brushing teeth, reading, learning, running, yoga, face beauty, coffee tea time, etc. Item Name: Mechanical Timer Material: ABS Features: Magnetic, High Precision, 360-degree Rotating Size Details: L: 8.3cm/3.27", W: 6.7cm/2.64", H: 2.5cm/0.98" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Mechanical Timer