0-22mA/4-20mA DC 0-10V Signal Generator, Mini Adjuatable Function Generator with LCD Display, Built-in 1000mAh Rechargeable Battery Current Voltage Analog Generator for PLC & Panel Debugging High Precision Output: 0-10V/0-22mA, precision is 0.01V/0.01mA, rotate the encoder knob to adjust output voltage, can be calibrated. Power Supply: Built-in battery ,micro USB-5V or external power DC 15-30V The current output is 2 3 4 wires. Passive and active are fully compatible. Store output value when power off.Output short circuit protection, reverse connection protection, charging protection.