It is a 2in1 Digital Tester/Dual display Digital Voltmeter Ammeter, Operating voltage:DC 4.5 ~ 30V, Measure Voltage Range:  DC 0 ~ 100V, Measure Current Range: 2A (measure directly,built-in shunt), It has small size, high efficiency, long term stable and reliable quality,easy installation and use . Applications:Suitable for Charger, Auto,Electric bikes,motorcycles,inverter, solar energy, wind turbines, LED lights measurement or other products voltage current measurement.

• Operating voltage: DC 4.5 ~ 30V
• Measure Voltage Range:  DC 0 ~ 100V
• Minimum resolution(V): 0.1V
• Measure Current Range: 2A (measure directly,built-in shunt)
• Minimum resolution(A): 0.01A
• Operating current: <20mA
• Display: three 0.28" LED digital tube
• Display color: Red and Blue (two-color display)
• Dimensions: 48 x 29 x 21mm
• Mounting cutout: 45.5 x 26.5mm
• Refresh rate: about 500mS / times
• Measure accuracy: 1% (± 1 digit)
• Operating temperature:  -10 °c ~ 65°c
• Operating Humidity: 10 to 80% (non-condensing)
• Working pressure: 80 to 106 kPa
• Application: industrial equipments,electronic equipment, Power distribution box, distribution cabinet, regulators, teaching aids, household small distribution box, Storage Battery Car,Motorcycle, Car, E-bike, ATV, Scooter, and All kinds Current Measuring.

• 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)

• 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

• 1 x Digital Voltmeter Ammeter ( 2in1 Digital Tester)