Cummins 6BTA5.9G2 coupled to Stamford alternator. 4 pole - 1,500RPM Sound Level: 70dB(A) @ 7m Quiet heavy duty enclosure, single point lifting frame, Cummins durability and performance. Includes auto start controller, long range fuel tank and circuit breaker. Optional weatherproof outlets available. 9 hour run fuel tank (at 75% load) Durable workhorse, reliable standby power, cost effective to maintain.