Item specifics: 1. Permanent magnet silicon rectifier generator is a combination of excitation silicon rectifier generator and permanent magnet constant voltage generator. The decent magnetic stripe rotor, the generator's own rectifier and the full-wave voltage stabilization device not only reduce the cost, generator output. It is a new generation product. 2. Usage: This product can be used for both AC and DC power. The wiring method is to connect the positive electrode of the battery to the generator ''+'' through the key-controlled live wire, and the negative electrode can be grounded for charging and lighting. Package Contents: 1*Magnet Motor Paramater: Maximum power 1000W Output voltage: 14V/28V DC Speed (r/min): 1000-r-4000-r Conditions of use: Driven by a diesel engine or gasoline engine, it can reach the specified speed. Can be used on single cylinder diesel engines and tractors. Notice: The size is measured by hand, please allow slight error of measurement. The photo size is displayed by different monitors, so it may be a little different.