New Innovative Powertrain The Surron 4th era powertrain was designed uniquely for Ultra Bee Black Edition. Its special full isolated electrical architecture can avoid opportunity interference among large and reduced voltage circuit elements.The mixture of 74V55AH battery pack and 12.5KW / 440N.m torque drivetrain will make Ultra Bee a https://sites.google.com/view/surron-2025/home