3pcs Adjustable 0.28-Inch Digital Blue DC Voltmeter 2.5-30V Two-Wire Display

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Product Features: Simple wiring: Connect with conventional two wires. Red for positive and black for negative connections. The device is reverse connection protected. No external p ower source required: Operates directly on the measuring voltage. Suitable voltage ranges are 2.50-30V for two-wire and up to 100V for three-wire systems. Wide voltage operation: Functions from as low as 2.50V up to 40V. Note: Voltages above 40V may cause damage. Display: Precision varies with measurement range. Two decimal places for voltages below 10V, and one decimal place for voltages above 10V. Specifications: Measuring Range: Two-wire DC 2.50~32.0V Power Supply: No external power supply needed Test Accuracy: ±1% for readings, >10V possible error of ±0.1V Input Resistance: Greater than 50KΩ Working Current: Refresh rate of approximately 100ms Display: Three-digit 0.28 LED digital display Lead Length: Default 20cm Dimensions: 30 x 11.5 x 9 mm Hole Size: Pitch: 26mm, Aperture: 2.4mm Net Weight: 4g Operating Temperature: -10 to +80°C Working Humidity: 10 to 80% Working Pressure: 80 to 106 kPa Package Includes: 5 x Voltage Meter Show more