3pcs 0.28 Inch DC Voltmeter, Adjustable 0-100V Red Digital Display, Three-wire

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Product Features: Simple Wiring: Our voltmeter features easy wiring with only two conventional wires. Connect the red wire to positive and the black wire to negative. It includes p rotection against reverse connections. No External Power Required: The voltmeter operates directly with the measured voltage. The measurement voltage range is 2.50-30V for two-wire and up to 100V for three-wire connections. Wide Voltage Operation: Operates safely from as low as 2.50V to a maximum of 40V. Voltage above 40V may damage the device. Display Precision: For voltages below 10V, two digits are displayed after the decimal point. For voltages above 10V, one digit is displayed after the decimal point. Technical Specifications: Measuring Range: DC 0-100V / 500V for three-wire systems. No External Power Supply Needed: The device is powered by the measured voltage. Test Accuracy: Accurate within ±1%. Error is ±0.1V for >10V measurements. Input Resistance: Greater than 50KΩ. Refresh Rate: Approximately every 100ms. Display Specification: Utilizes three digit 0.28" LED digital tubes. Lead Length: The default lead length is 20cm. Dimensions: 30 x 11.5 x 9 mm. Hole Size: Pitch: 26mm; Aperture: 2.4mm. Net Weight: 4g. Operating Temperature: From -10 to +80 °C. Working Humidity: Ranges from 10 to 80%. Working Pressure: From 80 to 106 kPa. Package Includes: 3 x Voltage Meter Show more