Dual-color digital display(red for Voltage and Blue for current), bright LED, easy to read Voltage measuring range: dc0-100v; current measuring range: 0-100a(decimal point move automatically) Flexible power supply, can use both isolated and non isolated power supply for powering up the meter With reverse connection protection to avoid burning for reverse connection Ground wire of testing end and power supply terminal is the same wire; quick refresh Features: Dual-color digital display(red for Voltage and Blue for current), bright LED, easy to read Voltage measuring range: dc0-100v; current measuring range: 0-100a(decimal point move automatically) Flexible power supply, can use both isolated and non isolated power supply for powering up the meter With reverse connection protection to avoid burning for reverse connection Ground wire of testing end and power supply terminal is the same wire; quick refresh Description: Display voltage and current simultaneously in different colors, red for voltage, blue for current.(the current is measured in the negative rail). Require external power supply; With reversed connection protection. Ground wire of testing end and power supply temninal is the same wire; quick refresh of about 500 ms/time Specification: Material: plastic Color: red, blue size: 482921 mm Working voltage: 4.5-30V DC Note: The maximum input voltage can not exceed 30V, otherwise there is the danger of burning Working current: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% ( 1 digit) Minimum resolution (A): 0.01A Operating temperature: -15 to 70 c Working pressure: 80 to 106 kPa Package includes: 1 x 100V 10A DC Digital Voltmeter Ammeter Note: The maximum input voltage can not exceed 30V, otherwise there is the danger of burning Working current: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% ( 1 digit) Minimum resolution (A): 0.01A Operating temperature: -15 to 70 c Working pressure: 80 to 106 kPa Package includes: 1 x 100V 10A DC Digital Voltmeter Ammeter