The Champion Power Equipment 4250-Watt Open Frame Inverter Generator is one of the most innovative products on the market. A feature-packed addition to your RV and a cost-effective power solution, this inverter is smaller, quieter, and BETTER! First, we cut the noise level in half by integrating Quiet Technology digital components used in more advanced inverters, then we created an efficient mechanical design to decrease the overall footprint and weight by 20 percent. Operate your Dual-Fuel generator on gasoline or propane and safely switch fuels with our patented fuel selector dial. Using gasoline, the 224cc Champion engine produces 4250 starting watts and 3500 running watts, and will run for 22 hours at 25% load when the 4-gallon fuel tank is full. It produces 4250 starting watts and 3150 running watts, and will run for 21 hours at 25% load when using a 20-pound propane tank. A 6-foot propane hose with a built-in regulator is included. Cold Start Technology ensures reliable starts, Intelligauge monitors voltage, frequency and operating hours, while smart Economy Mode monitors the electrical load to reduce engine speed, noise, and fuel consumption. With a 0.5-quart oil capacity (included 10W-30) and a low oil shut-off sensor, this inverter operates at an ultra-quiet 64 dBA from 23 feet, which is a bit louder than normal speech. Confidently connect your sensitive electronics since this inverter produces Clean Power (less than 3% THD). Covered outlets include a 120V 30A RV (TT-30R), two 120V 20A household outlets (5-20R) plus two handy 2.1A USB ports you can use to power your phone, laptop, or similar device. The optional Parallel Kit is sold separately and allows you to increase output by connecting up to two 2800-watt or higher inverters. Buy this EPA certified and CARB compliant generator with confidence – Champion Support and our nationwide network of service centers will back up your purchase with a 3-year limited warranty and FREE lifetime technical support.