... is LP.2.The easier usage way, the exchange between gas and LP ,only just need use a switch in panel ... : Use LP type, which will make the cheaper cost than gas further.Certificate:CE,EPA,ISO9000,SONCAPOutput scope:2KW,3KW,4KW ... start or Electric start.Engine model: Single cylinder, 4-stroke,air cooling, gas engine.Engine brand: WD brand, or other famous brand ...