Specifications Model Number: 10KPRO Rated Wattage: 10,000 Surge Wattage: 12,500 Alternator: Voltage Regulation: 10KPRO Portable Generator <5% THD, All Copper Automatic/Remote Mounted Displacement: 680cc V-Twin Type: OHV, 4 Stroke 3600 Lubrication: Pressure / Intercooled w/ Automotive Filter Choke: Manual / Electronic Manual Starting: Electric Only Battery: Included, 21 Ahr Battery Charging: Engine Protection: Emission Certifications: Other Certifications: Receptacle Protection: 120 Vo