Packing Details: 1 kitchen of small size (6.3 x 4.5 cm) and 1 large size (7.2 x 5.5 cm), 60 minutes at a time, and the polling time is 3 seconds. How to use:Open---Turn clockwise one circle to zero; Timing --- Rotate counterclockwise to desired time (1 - 60) minutes, when time is up, a clear bell will ring for three seconds. Applications Our products are ideal for home cooking, baking, grilling, egg cooking, arts and technology, sports, training, learning, classes, games , homework, brushing teeth, bathing or working. Features: Built-in mechanical alarm device, no need to replace batteries frequently. When the time is up, you will be notified. In low noise conditions, the alarm is loud and clear. Both adults and children can operate with a simple twist of their hands. Disadvantages: The ringing time is only 3 seconds, so it is not suitable for placing in food cooking or remote places for a long time, and the ringing time is short may result in loss of cooking time. Warranty: High quality products and service are our top priority. If you have any questions about this product, please contact us.