1. Three-in-one electronic clock module, integrating three practical functions: time, thermometer and voltmeter
2. Using RX8025T clock chip, the timing accuracy is stable
3. The lengthened temperature probe can effectively solve the problem that the temperature affected by the module temperature is not accurate enough
4. Power supply voltage: DC5.0-30V
5. Temperature function range: -40-120 degrees Celsius, resolution 0.1
6. Voltmeter function range: DC5-30V (requires pure DC power supply, it is not recommended to use 24V battery, because the voltage may be too high during charging and burn)
7. Size: about 4x1.4x1.3cm

Function and usage instructions:
1. Adjust time, date, year, voltage error, temperature error cycle display item definition, alternate display interval time
2. In the non-setting state, press the left key to enter the time adjustment (note that the colon in the middle is bright):
- At this time, the minute bar starts to flash, press the right button to increase, the adjustment range is 00-59, after adjusting, press the left button again, the hour bar starts to flash, press the right button to increase, the adjustment range is 00-23
- After adjusting the hour, press the left button again to enter the date adjustment (note that the colon in the middle is off), at this time the date column starts to flash, press the right button to increase, the adjustment range is 1-31, after the date is adjusted, press the left button again key, the month column starts to flash, press the right key to increase, the adjustment range is 1-12, after adjusting the date, press the left key again, the year column starts to flash, press the right key to increase, the adjustment range is 2012-2049
- After adjusting the year, press the left key again to enter the error calibration function of the displayed voltage, the unit is 0.1V, a positive number means increase, and a negative number means decrease
- Then press the left key again to enter the temperature error calibration setting, press the right key to increase, a positive number means increase, a negative number means decrease, the unit is Celsius
- Press the left button again to enter the definition function dd option of the display item in the cycle display state,
Press the right button to change the value: (dd:0) time + temperature + voltage, (dd: 1) time + temperature, (dd: 3) time + voltage
- Press the left button again to enter the cycle display alternate interval time dF option, press the right button to change the value, the larger the value, the longer the interval
- Press the left button again to save all the set values ​​and return to the normal display state
3. Switch display items: in the non-setting state, press the right key to switch the display items, and the display will switch between the time-date-temperature-voltage alternate display