This is a standard LED Current Meter 50A. The biggest feature is that the LED Current Meter have reversed connection protection to prevent from being burnted out. It measures 0-50A with 2% error. Best suitable for current display in the circuit. Just apply four wires without any extra circuit or components, you will get the readings displayed straight away. Easy to use, and good company with robot applications. It has two color LED display to select, green/red.