Working voltage :DC 15~27V /Mirco USB 5V1.1CH analog output, optional voltage type (output range 0/2-10V) or current type (output range 0/4-20MA)2. Voltage-type output load impedance requirements greater than 2K, current-type output impedance requirements less than 5003. voltage, current output, a key switchIndicator descriptionV (red) is , output is 0-10V voltage signal; flashing, output is 2-10v voltage signalmA (green) is , output is 0-20mA current signal; flashing, output is 4-20mA current signalPort description:PWR: to DC15-27V Positive SupplyGND: and signal groundGND: and signal groundV0: Voltage analog output interfacemA0: Current Output Analog Output InterfaceMaterial:ABScolour:As ShownPackage Contents:1 x Signal GeneratorOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.