Feature:1. [COUNTDOWN TIMER] The digital timer supports countdown from 99 minutes and 55 seconds to zero, or as a stopwatch from zero to 99 minutes and 55 seconds. With a magnet on the back, which can be placed directly on any iron surface.2. [ALARM AND MUTE SUPPORT] With 3 levels of alarm, from 0dB to 90dB, to meet your different needs. When it runs silently, it is suitable for classrooms, libraries and offices. It reminds you by flashing the screen.3. [SIMPLE One key operation, press /SP button on screen to start or stop counting, and the value will increase/decrease at a minimum unit of 5 seconds. Both the elderly and children can easily use it.4. [METAL KNOB] The use of high quality aluminum alloy + ABS material, the smooth makes it easy to , will not hide dirt, to use, resistant, and long service life.5. [2 BRIGHTNESS MODES] Normal mode, the brightness is constant; power saving mode, when there is no operation, the number will dim in 5 seconds and turn off in another 5 seconds to save battery power.How to Use:Install the battery (not included) to useSpecification:Item Type: Digital TimerMaterial: Aluminum Alloy + ABSWeight: Approx. 110g / 3.9ozPower Supply Mode: 3 x AAA Battery (Battery Not Included)Screen Size: 3 inchesProduct Size: Approx. 7.8x7.8x2.75cm / 3.1x3.1x1.1in Package List:1 x Timer (Battery Not Included)1 x ManualNote:1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.