This automatic voltage regulator is used to control the output of gasoline generator. Mounted near the generator and connected with several wires to measure and adjust the generator. By increasing or decreasing the generator control voltage, the output voltage of the generator increases or decreases accordingly. Widely used for for 2KW to 3KW, 168F gasoline generator. The wire direction might differ, as the blue square might be in left or right, please take the real one as standard., Weight: 0.220462262 Pounds, Manufacturer: Walfront