Detailed Spec: Model# GKJ4500D Dual Fuel: Rated Voltage & Frequency 120V/60HZ: Running VAC Amperage 30A GAS /27.5 A LPG?: Rated Output 3600W?GAS?/3300W LPG: Max. Output 4500W?GAS?/4200W LPG : Enigine Brand GENKINS GK225: Engine Type OHV,4-stroke: Engine Displacement 223 cc: Bore X Stroke 2.76*2.28 inch: Engine RPM 3600 rpm: AC Load 100%: Phase Single: Recommended Oil SJ 10W-40: Lubrication Method Splash: Choke Type Manual: Fuel Tank - Gasoline 4 gal: Fuel Gauge YES: Starting Method Recoil start: Low Oil Shutdown YES: Oil Volume 1.16 pt: Compression Ratio 8.7:1: Ignition Type Transistorized magneto ignition: Full Load Run Time 6.5 h: 1/2 Load Run Time - Gas 9 h: Circuit Breaker YES: Muffler YES: Frame Thickness 0.047 inch: Noise Level: 70dB/7m: THD 25%: Emissions EPA: Net Weight 95 lb: Gross Weight 101 lb: Assembly Dimensions (L*W*H)(in./mm) 23.2*17.3*17.7 inch: Package Dimensions (L*W*H)(in./mm) 24.8*18.7*18.9 inch: Receptacle Details (Type and rated amps) L5-20R 120V/20A*2,L5-30R 120V/30A: Accessories included Spark plug socket, Quick guide, manual: