1Universal-direction Wheel, ATS,R485S tandard Conmmunication Connection, 2Electric self-suction Pump.Heater 3special dual prot main features:1 the lightest and ... :Universal-direction Wheel, ATS,R485S tandard Conmmunication Connection,Electric self-suction Pump.Heater 2.8KW-5KW silence air-cooled diesel generator