Two-stroke Easy start and low fuel consumption Overload protection for safe running Brushless alternator Optional auxiliary 12V DC output A compact and portable power for recreation, emergency and home use Model: VT650 Frequency(Hz): 50/60 Rated Power(w): 450/550 Voltage(V): 220/120 Run Time(Hrs. ): 8 Fuel: Gasoline, two-stroke Lubricant oil=50: 1 Fuel Tank(L): 4 Displacement(cc): 63 Noise level at 7m(dB) 64-65 Dimension(L*W*H)(mm): 385*315*330 G. W(kg): 21-22 N. W(kg): 19-20 Note: We can adjust voltage and frequency according to consumers' demands.