All LIFAN generators are made with Horizontal Shaft OHV engines which feature Industrial duty upgrades like cast iron sleeves, automotive grade rods, pistons, rings, crankshafts, valve and valve springs. The OHV design provides better Fuel Efficiency, Quieter Operation and Longer Life. This 3,500-Watt Energy Storm Generator is great for Tailgating, Camping, Power Outages, Emergencies, Parties, or for power anywhere, and is ideal for Homeowners and Pros who are looking for exceptional value combined with premium quality. It is very quiet at only 65 dB sound level at 7m (23ft.), and boasts a Master circuit breaker, individual circuit protectors, a 1 inch rolled steel tube frame, and an anti-vibration alternator and engine isolator. Additionally, the ES3900-CSA is pre-drilled and tapped for the optional wheel kit (sold separately). Parts to maintain and repair LIFAN engines and equipment are available.