Specification:
External Power Supply:DC15-30V 1W(Non charge)/5W(Charging);
External Connection microUSB- 5V :0.2A(Non charge)/1A(Charging);
Adjustable Voltage Output 0-10V, Precision 0.01V,Can Be Calibrated;Maximum Output Current 20mA;
Adjustable Current Output 0-22mA,Precision 0.01mA,Can Be Calibrated;Sampling Resistor Is Not More Than 500Ω;
Digital Display Digit 4 Digit, Two Decimal;
Encoder Knob Rotate One Circle Has 20 pulses;
Power: Micro USB port or DC24V (Battery Not Included)
Multiple Display: just push the small botton to switch the display mode between voltage and current, you can also follow the instructions to switch 0-100 percent or 0-50HZ display.

Package List:
1 x Digital Signal Generator 0-20mA Current Transmitter