This is a standalone DC voltage meter. It measures 3V-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 is a good company with robotic applications.

Three colors options: green/blue/red.

Specifications:

Measure Voltage:3.0-30V DC

Refresh Rate:2 Hz

Accuracy:1%