Specifications：
Material: ABS
Working voltage: 4.5V
Working temperature: 0°C~50°C;
The whole machine has no power switch, and three AAA batteries are installed;
Timing range: minutes 00~99 seconds 00~59
THE VOLUME SETTING CAN BE ADJUSTED IN THREE STEPS: LOUD 90DB, QUIET 30DB, MUTE;
Brightness setting: the back can be toggled to adjust the brightness (long light mode and energy-saving mode);
Magnet on the back to attach it to a ferrous metal surface or stand on a tabletop;
In the working state, the energy-saving mode has no operation, and the display brightness is automatically reduced after 5 seconds, and the display is automatically turned off after 5 seconds.
No operation in long light mode, the display brightness will automatically decrease after 5 seconds, and the display will automatically turn off after seconds;
