Specifications:
Working voltage:4-30V DC
Note: The maximum input voltage can not exceed 30V, otherwise there is the danger of burning
Working current:â?¤20mA
Display: 0.28" Two color blue and red
Measuring range: DC 0-100V 0-10A
Minimum resolution (V): 0.1V
Refresh rate: 100mS / times
Measure accuracy: 1%
Minimum resolution (A): 0.01A
Operating temperature: -15 to 70°c
Working pressure: 80 to 106 kPa
size :48x29x21 mm/1.88*1.14*0.82 inch

Package Included:
Wiring:
Black line (thin): vacant or buck circuit (module) negative
Red line (thin): power supply+
Black line (thick): COM, common measuring
Red line (thick): PW+, measuring terminal voltage input positive
Yellow line (thick): IN+, current input+
(Please refer to the wiring diagrams for more details)

Notice:
The voltage between the thin red and thin black lines must be within DC 4.5-30V
The ammeter can only be connected to the negative of the device under test
10A below ammeter (include 10A), built-in shunt, does not require external shunt
When the black thin line vacant, it is better to use insulating tape around the exposed part of the wire, to prevent short circuits
If just be used as a voltmeter, it is recommended that the yellow line and the black line were connected together, to prevent the ammeter digital flashing
2* DC 100V 10A Voltmeter Ammeter Blue Red LED Dual Digital Volt Amp Meter Gauge