Product description :
Makerfocus 5pcs Mini Digital Voltmeter DC 0.28 Inch Three-Line DC 0-100V Mini Digital Voltmeter Gauge Tester LED Display Reverse Polarity Protection and Accurate Pressure Measurement 5 Colours

Features:
1. High precision
2. Reverse connection protection
3. Able to djustable voltage resistance-Turn clockwise to lower voltage, it can work directly in 5v, 9v, 12v, 24v.
4. Three-wire connection, but it can also change three lines to 2-wire connection.

Specification:
Operating Voltage: 4.0-30V
Detecting Voltage: 0-100V
Working Current: <20 mA
Detection Rate: ≥ 200 mS/Times
Install the hole: 23 * 10 mm
Measurement Accuracy: 3 %
The minimum working voltage: +4 V
The maximum working voltage: +30 v
Working temperature:-10 ~ +65 ℃
Working humidity: 10~80% (No condensation)
Dimensions: 22.5 * 10 * 7 mm
Measurement rate: ge; 200mS / times
Operating temperature: -10 ~ +65 ℃
Working humidity: 10~80%
Working pressure: 80~106kpa
Color: This package include 5 colours Three-Line Mini Digital DC Voltmeter

Package Including
5 * Three-Line DC 0-100V Mini Digital DC Voltmeter(Red, Yellow, Green, Blue, White)