DFRobot DFR0130-B Panel Meter, 4.5V-30V LED Voltage, 3-Digit, 1% Accuracy, 1.88" W x 1.14" H, Blue 200 MHz Digital Oscilloscope with

200 MHz Digital Oscilloscope with 4 channels

with unit & function symbols

CMOS: <30%Vcc ±10% HI blinking intensity

AC: 200µA-20mA: ±(1

Electromechanical Relay Gravity Platform Evaluation Expansion Board

DFRobot DFR0130-B Panel Meter, 4.5V-30V LED Voltage, 3-Digit, 1% Accuracy, 1.88" W x 1.14" H, Blue 200 MHz Digital Oscilloscope withMeasure voltage: 4. 5 30V dc Refresh rate: 2 hz Accuracy: 1 percent Dimensions: 1. 88"W x 1. 14"H (face), 1. 80"W x 1. 02"H (rear) This is a standalone DC voltage meter. It measures 4. 5V 30v with 1 percent accuracy, best suitable for battery level display. Just apply two wires on the power without any extra circuit or components; it gives the reading straight away. Easy to use, and good company with robot application.