It is a Ultra-high Measurement Precision Three Wire Red/Blue/Green LED Digital Voltmeter, Power Supply DC 5-30V,Measuring Range DC 0-30.000V ,easy installation and use .Can be used to All kinds Voltage Measuring.

Feature:

• Dimensions:48mm x 29mm x 21mm
• Measure voltage: DC 0-30.000V
• Power Supply: DC 5-30V (separate powered )
  
• Input Polarity: DC voltage
• Refresh rate: 5 times per second
• Measurement precision: ± (0.3 ‰ +2 digit)
• Display: five 0.36" digital LED Tube
• Display Color: Red/Blue/Green
  
• Operating temperature: -10°c to 65°c
• Temperature coefficient: less than 25PPM /°c

•  Red: Power Supply+ (DC 5-30V)
•  Black: Power Supply -, Measure -
•  Green: Measure +
• (please refer to the wiring reference for more detail)
  

•  1x Digital Voltage meter