IMPACT-TO-WEIGHT RATIO: 35 ft.-lbs. impact energy while to tools weights 63 pounds. TOTAL PORTABILITY: Operates on 115/120 V AC/DC,15-AMP outlet or 2,500-watt portable generator VIBRATION CONTROL SYSTEM: Elongated air cushion in the hammer mechanism for all-day use ERGONOMIC SHOCK ABSORBING HANDLES: Also reduces vibration for greater user comfort SERVICE MINDERBRUSHES: Preventative-maintenance assurance for long tool life GREASE-PACKED GEARBOX AND HAMMER MECHANISM: Eliminates uncertainty of worksite lubrication RUBBERIZED NONSLIP HOUSING COVER: Reduces accidental fall-over