How to use:1. Press SECOND button to set the second.2. Press MINUTE button to set the minute.3. Press START / STOP button to start / stop the timer.4. Press RESET button to reset the timer from zero.5. The timer will ring when the count down is finished.6. Press any button to stop the ring.Specification:Material: ABSPower Supply: 1 * AAA Battery(not included)Size approx. 8.2*6.2cm/3.23*2.44inWeight approx. 56g/1.98oz Features: This electric timer is made of ABS material, good toughness, anti-aging and durable. Large LCD screen clearly displays the correct time, easy to read. Includes a magnet base, can be fixed on any iron surface. Up to 99 minutes 59 seconds to countdown. Can be used to set up time for cooking, baking, game times, fitness and so on.