Product Power supply: 1 * AA battery (battery is not included in the delivery, please prepare by yourself) Function: Display, timing, countdown, easy to operate Application scenario: home/study/cooking/yoga/office/fitness Minimal operation, capable of quick operation for both elderly and children 00:00-99:59 Extra long timer to meet various needs There is a magnet on the back that can be attached to any ferrous object for easy viewing Small size, can be operated with one hand, easy to carry Operating steps: 1. Press the "M" key to select minutes from 1 to 99, and press and hold to speed up. 2. Press the "S" key to select a number from 1 to 59 seconds, and press and hold to accelerate the speed. 3. After adjusting the minutes and seconds, press the "ST/SP" button to enter countdown mode; Press again to stop the timer. 4. Press the "M, S" keys simultaneously to reset 00:00 Note: The colors of the items displayed in the photos may appear slightly different on your computer monitor because the calibration of the monitor is different.