This is a engine voltage regulator, AVR, rectifier. Voltage: DC12V; Applicable area: agriculture; Accessories type: engine accessories; Model: 186F KDE3500 5000 6500 6700. This engine voltage regulator is typically mounted on the engine and used to charge the battery. This engine voltage regulator has 2 plugs with a total of 3 wires. If your generator has no output and/or your battery isn't charging, this is the part that most likely needs replaced. Material:aluminum colour:Silver Package Contents: 1 x Engine Voltage Regulator Only the above package content, other products are not included. Note: Light 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.