The Yamaha EF12000DEY 1200W Generator has dual voltage that provides the versatility of 120 and 240 volt operation. The OHV engine (overhead valve) has precise valve actuation and heavy-duty design offer improved efficiency, increased reliability and quite operation. Cast iron cylinder lining provides optimal heat dissipation, consistent performance during continuous use and long engine life. An Oil Watch Warning System automatically shuts off before oil level is low and cannot be re-started until oil is added. This prevents engine damage and costly repairs while enhancing long-term durability. Auto Voltage Regulation guarantees correct power delivery even with extension cords, enhances performance, adds convenience. Transistor Controlled Ignition (T.C.I.) provides clean, efficient spark that ensures fast, easy starting. It is low maintenance, yet a reliable operation. The Noise Suppressor reduces electrical interference with TVs and radios. Auto Decompression - Automatically "opens" exhaust valve slightly to reduce initial backpressure when starting making manual starting effortless. USFS-approved Spark Arrestor offers quiet operation and keeps sparks from exiting exhaust system, reducing chance of fires caused by an errant spark. The Ground Fault Interrupter (G.F.I.) is for if the system senses a leak to "ground," it automatically cuts off power to help prevent injuries. The Fuel Gauge lets operator monitor how much fuel is left. It has an electric starter for convenient ease of operation. It features economy idle for when there is no load on the generator, it automatically returns to idle for improved fuel efficiency and quieter operation. AC Non-fuse Thermal Breaker protects AC circuit in case of an overload for added durability and peace of mind. The tool kit makes service easier.