Product Usage This product is widely used in cooking, boiling, studying, lunch break, beauty, printing, driving, sports, calls, experiments, meetings, etc., to help you accurately grasp the time Function Description LCD screen display, the accuracy is calculated in seconds, and the longest can be set to 99 minutes and 59 seconds. 1. Countdown time range: 1 second - 99 minutes and 59 seconds; 2. Clear display: large screen, easy to see and easy to set time; 3. Automatic reset: After each countdown, press the "START/STOP" key to restore to the last countdown time. 4. End reminder: When the countdown is over, it will continue to remind you with a "didi" sound for about 30 seconds before it stops. [Battery]: Use one AG13 button battery (included in delivery) Note: 99 minutes and 59 seconds are timed. Press and hold the M key and the S key at the same time to clear 0. 1. Due to different monitors and lighting effects, the actual color may be slightly different from the image 2. Due to manual measurement, please allow 1-3cm deviation Size: 3cm*1cm Shipping color: white Quantity shipped: 1