5/10Pcs DC 100V 10A Digital Voltmeter Ammeter LED Amp Volt Meter Current Gauge Product Feature: Characteristic: 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. Simultaneously monitor DC voltage up to 100V and current up to 10A Auto ranging: 0.01V 0.01A, voltage tolerance: ±1%, current tolerance: ±0.1% Working current: <20mA, Refresh rate: 300ms, Operating Temp: -10℃ - 65℃.DC only, not for use with AC 4-30V supply voltage. With mini Size: 48 x 29 x 21 mm, Hole size: 46x27mm, wide measuring range(DC 0-100v; 0-10A) and high accuracy percent ( ±0.1%). Applications: Suitable for monitoring voltage of storage battery, mastering voltage state of storage battery, and measuring voltage and current of other devices. Note: 5/10Pcs DC 100V 10A Digital Voltmeter Ammeter LED Amp Volt Meter Current Gauge. Product Specification: Type: DC Voltmeter Ammeter Quantity: 5pcs/10Ppcs Voltage Measuring range: DC 0 - 100V Current Measuring range: DC 0 - 10A. Auto ranging: 0.01V 0.01A Voltage tolerance: ±1% Current tolerance: ±0.1% Refresh rate: 300ms Operating Temp: -10℃ - 65℃ Size: 48 x 29 x 21 mm Hole size: 46x27mm Connector: red for Voltage, Blue for current (the current is Measured in the negative rail) Application: for monitoring voltage of storage battery, mastering voltage state of storage battery, and measuring voltage and current of other devices Package Included: 5 x Digital Voltmeter Ammeter 10 x Cable