Features: 1.High-definition mirror refracts light, matched with silver rotating shell, cool and fashionable. 2.Precise electronic timer, fast adjustment without repeated mechanical pressing every 5 seconds. 3.Large mirror high-definition digital display, clear numbers from any angle. 4.Silent timing design, no noise when working, ideal for focused learning and office. 5.Three-level timing reminders, adaptable to different sound volume needs. 6.Timing range: 00:00-99:55, supports positive and negative dual timing. 7.Easily adsorbed on metal surfaces like blackboards, refrigerators, firm and anti-falling. Notice: Actual color may slightly differ from images due to monitor and light effects. Please allow 1-3cm deviation due to manual measurement. Description: Name: Rotating Countdown Timer Material: ABS Colour: As shown Working voltage: 4.5V (3 AAA batteries, not included) Working temperature: 0°C-50°C Timing range: 99 minutes 55 seconds Volume settings: Silent 0db, Low 60-70db, High 80-90db Product size: 78*78*27.5mm Countdown setting: Rotate knob to set time (right to increase, left to decrease); press mirror to start. Rotating over 60 degrees for minutes, under 60 degrees for seconds. Positive timing setting: Set to 00:00, press mirror to start; long press 1 second when paused. Package List: 1*Stopwatch