AMP & VOLT DUAL SIGNAL GENERATOR: The multifunctional signal generator set can generate ampere and voltage with 1 module, which generates 0/4 - 20mA current signal and 0-10V voltage signal simply by rotating a precise multi-cycle potentiometer, making it simple and practical. CLEAR LED DISPLAY: The 4-20mA signal generator features a clear, 3-digit LED digital display that can be used to monitor output current and voltage. You just need to press the button below the screen to easily switch the display. AMP & VOLT DISPLAY CALIBRATION: There is a current and voltage display calibration potentiometer on the back of the module. If the display is inaccurate, you can calibrate the current voltage display value yourself. WIDE APPLICATION: The signal adapter can be used as a signal generator, valve adjustment, inverter control, PLC debugging, panel debugging, LED testing, and transmitter output simulation. OTHER FUNCTIONS: With LCD screen to display frequency and duty cycle value; with case; PWM output, can set frequency and duty cycle separately with buttons; frequency value is divided into 4 ranges and switched automatically, with high precision. Note: Physical color difference or variation does not affect use, please don't worry! Color: as shown Material: PCB+plastic Package Contents: 2 * Signal Generator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.