RioRand 0.4" Small Digital Display Volt Meter DC 0-99.9V Green LED Tester Voltage Guage

Features:
Display: 0.4" LED digital tube;
Board Size: 34mm x 16mm
LED Size: 30mm x 16mm x 9mm
Refresh rate: about 300mS / times;
Range: 0-99.9V
Display Color: Green
Input Polarity: DC voltage;
Overload: 4 times range;
Input impedance: 100Kohm;
Accuracy: 0.1 %
Power Supply: DC7-30V;
Operating temperature: -40°c-85°c
Wiring:
Red: Power Supply +
Black: Power Supply -, Measure -
Green: Measure +
Package Includes:
1x Digital Voltmeter