JAMHER 2 PCS 0.28"Digital Voltmeter Ammeter DC 0-100V 10A, Red and Red Detector Current Meter Panel Amp Volt Gauge, Volt Amp 2in1 Tester for 12V/24V Multimeter Amperage Meter Volt Amp Gauge Panel

• Measuring Range: Voltage measuring range: DC0-100V; current measuring range: 0-10A(decimal point move automatically).Note: The voltage below 10V is displayed as 0.00V; the current below 0.05A cannot be measured, and the display is 0.00A
• Built in Shunt: 10A voltage and current meter itself has a built in shunt
• Color distinction: Led Display Voltage and current simultaneously in same colors, red for Voltage and current(the current is measured in the negative rail), easy to read
• Connection Protection: Require external power supply, With reversed connection protection
• High Precision: Measure accuracy: 1% (± 1 digit). Ground wire of testing end and power supply terminal is the same wire; quick refresh of about 300 MS/time

Specifications： Operating Current: <20mA Operating temperature: -10 to 65°c Measure current: DC 0 - 10A Refresh rate: ≥300ms / times Operating voltage: DC 4 ~ 30V Measure voltage: DC 0 ~ 100V Measure accuracy: 1mA Minimum resolution (A): 0.001A Display mode: Dual-colour digital display 0.28" LED digital tube Display color red. Wiring methods(thin): Black line (thin): vacant or buck circuit (module) is negative. Red line (thin): Power Supply. Volt Meter Gauge Car Current Monitor Tester 0.28" inch .  Wiring methods(thick): Black line (thick): COM, common measurement. Red line (thick): PW +, measuring terminal voltage input positive. Yellow line (thick): IN + input + current. 0.56" Digital Voltmeter Ammeter DC 100V 10A Amp Voltage Current Meter Tester 0.56 Inch. Function: 1.Require external power supply; with reversed connection protection. 2. With built-in shunt, has Voltage and current calibration potentiometers. 3.DC voltmeter ammeter has handy connection and wide application, for example, it can be applied to monitoring storage battery, DC adjustable power supply, or voltage and current changing state of other device. Package Included: 2 x Digital Ammeter Voltmeter. 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.