1)Durable 4-wheels and handle structure 2)gasoline engin190, 15hp,air cool, 3)CE,EPA,SONCAP,ISO9001: ... Output (hp)2.5HP5.5HP7.0HP6.5HP7.0HP15.0HP15.0HP15.0HP15.0HPCompression ratio6.8:18.5:18.5:18.5:18.5:18.0:18 ... low oil alert warn the low lube oil level. ATON 2.5/2.7KW 7hp Air-Cooled Brushless Gasoline Generator