This is a standalone DC voltage meter. It measures 4.5V-30V with 1% 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.
Measure Voltage: 4.5-30V DC
Refresh Rate: 2 Hz
Dimensions: 1.88"W x 1.14"H (face), 1.80"W x 1.02"H (rear)