Battery. Engine Oil. Maintenance Kit. Instruction Sheets. Low-oil shutdown detects low oil levels to prevent engine damage. Low-tone mufflers for quieter operation. Heavy-duty hardened steel tube cradle gives extra strength and durability. Circuit breaker protected outlets guard against circuit overload. Hour meter tracks usage between maintenance sessions. Never-flat wheels for better portability. Electric start for easy start up. 16 gallon fuel tank for extended run time. Idle control increases fuel efficiency. Lifting eye allows for easy transport. Good Housekeeping Seal of Approval. Unit not for use or sale in California, CARB compliant units available