Features AMP and VOLT Dual Signal: The multifunctional signal generator kit can generate ampere and voltage through one module, just rotate a multi cycle precise potentiometer to generate 4 to 20mA current signal, which is simple and convenient. Clear LED Display: Our 4 to 20mA signal generator features a bright and clear 4 digit LED digital display that can be used to monitor output current and voltage. You can easily switch monitors by simply pressing the switch under the monitor. Ampere and Voltage Display Calibration: There are current and voltage display calibration potentiometers on the back of the module. If the display is not accurate, you can calibrate the displayed value of the current voltage yourself. Wide Range of Applications: Our signal adapters can be used for signal generators, valve adjustment, inverter control, PLC debugging, panel debugging, LED testing, analog transmitter output. Good Performance: Coarse and fine tuning dual modes, and the number of turns can be set separately. The minimum adjustment number of the knob is 0.01mA, the last number is added or subtracted by 1. After calibration, the actual error is 0.01mA, and the h Feature: 1. Reliable Performance: 4 bit 0.4 inch high brightness large digital tube, the display is clearly visible. Digital encoder knob, durable and unaffected by the environment. Power supply with reverse polarity protection. The output can be short circuited. Specification:Item Type: 4-20mA Current Voltage Signal Generator Product Model: JS-020ISG-S-3L-J4 Current: 4-20 (mA) Material: ABS Color: As Pictures Shown Weight: Approx. 58g / 2.0oz Package List:1 x Signal Generator Package List 1 x Signal Generator