Description:  Functional characteristics: stc single-chip computer +8025+ voice playback.  1. Simultaneously display the current date, week, time and temperature for easy viewing.  2. Large-size digital tube display (date, week 0.8 inches; time 1.0 inches; temperature 0.56 inches).  3. Time and temperature precision:  The time IC uses RX-8025AC, with a built-in frequency adjustment 32.768khz crystal oscillator ±5*10-6.  The temperature IC is DS18B20 with an error of 0.5°C. Positive and negative temperature display, positive temperature display accuracy is 0.1℃, negative temperature display accuracy is 1℃.  4. Gregorian calendar and lunar calendar display and switch automatically (10s).  5. Voice timekeeping function (automatic timekeeping on the hour, manual timekeeping by pressing the button).  6. Hourly timekeeping function: the hourly timekeeping function can be turned on and off.  7. Alarm clock function: turn on and off the alarm clock function.  8. Countdown function (maximum countdown time 99 hours 99 minutes 250 seconds).  9. Brightness automatic adjustment function (from 7 am to 9 pm, daytime brightness; 10 pm to 6 am, night brightness).  Without shell size: 180mm *26mm * 80mm(length* wide *high).  With shell size: 180x82x25mm.  Weight with case: 295g.  Working voltage: 5V (powered by mobile phone charger and Android data cable, power bank, usb port).    Package included:  1 x clock production kit