Firman Power Equipment P03602 3650/4550W Generator - Perform Longer & Stronger with Phoenix Fat Head Blocks & Firman PowerStream Alternators. Low oil shutdown and cast iron sleeve improve performance. High leverage single folding handle with grip for easy maneuverability and a quiet muffler (Whisper Series) with USDA FS certified spark arrester and mobility kit included. Volt Lock: Automatic Voltage Regulator VS (Voltage-Compensator) series. 4-in-1 Data-Minder monitor Volts, Hz, Hours and low oil, Color coded control touch points and wheel kit. The FIRMAN OHV engine ( Max-Pro Series) for longer life/higher performance/lower maintenance. Cast iron sleeved (CIS) engine for long durability with automatic low oil shutdown (LOS) protection. Largest tank in industry with extended run-time (less re-fueling) with built-in tank gauge for convenience. Quiet muffler (Whisper Series) with USDA FS certied spark arrester. Conveniently located multi-featured control panel with FIRMAN custom designed outlet cover protecting outlets from dirt, dust and debris.