Feature:
Multifunction, Time / Voltage / Temperature, 3-in-1;
Power supply voltage: DC 7~30V (with anti-reverse protection);
Display: Four 0.56" LED digital tube;
Display Color: Red;
Refresh rate: about 300ms / times;
Operating temperature: -40~85'C;
Measuring temperature: -55~125'C;
Accuracy: about 0.0625'C;
Sensor cable length: 80~100cm;
Sensor probe: 18B20;
Application: for measuring car, room, water, refrigerator, aquarium temperature and DIY, etc;
Measuring voltage: Range 0~30V DC, Accuracy +/-0.1V;
Clock: 24-hour, the battery backup is available 3~4 years;

Display modes:
Only display time;
Only display voltage;
Only display temperature;
Time temperature voltage alternating display;

Mode setting button:
Short press to select the clock, seconds, voltage, temperature display mode;
Long press show "ALL", enter the time temperature voltage alternating display mode, interval of 5 seconds. Short press to exit;
Time setting button:
Short press to adjust the hours, minutes (flashing). Short press again to exit;
Short press the "Mode setting button", the clock starts running;

Wiring of voltage measure:
Red: Power Supply +;
Black: Power Supply -, Measure Voltage -;
Green: Measure Voltage +;