Working voltage: DC 15~27V / Mirco USB 5V 1.1 Channel analog output, selectable voltage type (output range 0 / 2-10V) or current type (output range 0 / 4-20MA) 2. Voltage type output load impedance requirement 2KOmega, current type output impedance requirement le 500Omega 3 voltage, current output, one button switch 4. Size: 85 x 50 x 22mm material: plastic Color as shown Indicator description V (red) is on, the output is 0-10V voltage signal; flashing, output is 2-10v voltage signal mA (green) is on, output 0-20mA current signal; flashing, output is 4-20mA current signal Port Description: PWR: Connect to DC15-27V positive power supply GND: Power and signal ground GND: Power and signal ground V0: voltage analog output interface mA0: current output analog output interface Package Contents: 1 x 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.