Specification:

Input Voltage: DC 4.5-30V / AC 30-500V

Detection Voltage: DC 4.5-30V(2 cable) / DC 0-100V (3 cable)/ AC 30-500V (2 cables)/ AC 0-600V (3 cables)

LED color: Red/ Green / Blue

Cable Length: 20cm

Marking: 

DC 4.5-30V old type can not calibrate the reading. 

Others all have the resistor to calibrate the reading.

For the item of 30-500V AC, can not work with SCR Voltage regulator. If need to work with SCR Voltage Regulator, choose the item of 0-600VAC

1 voltmeter + 1 set connection cable