1This automatic voltage regulator is used to control the output of electric generator 2It is connected to the generator and with several wires to stabilize the voltage 3By increasing or decreasing the generator control voltage, the output voltage of the generator increases or decreases accordingly 4The voltage regulator is suitable for three-phase 220/380/400VAC generators 5It is easy to wire and convenient to use Features:This automatic voltage regulator is used to control the output of 3-phase brushed electric generator. It is connected to the generator and with several wires to stabilize the voltage. By increasing or decreasing the generator control voltage, the output voltage of the generator increases or decreases accordingly. The voltage regulator is suitable for three-phase 220/380/400VAC generators. It is easy to wire and convenient to use. Specifications:Model: GB-170 Input Voltage: 220/380/400VAC Frequency: 50-60HzOutput Voltage: 14V (adjustable) Power: 1VAVoltage Regulation: Package Includes:1 x AVRNote: Please allow 1-2mm error due to manual measurement. Thanks for your understanding. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.