New Impressive Powertrain The Surron 4th technology powertrain was designed uniquely for Ultra Bee Black Edition. Its special full isolated electrical architecture can prevent probable interference among large and low voltage circuit elements.The combination of 74V55AH battery pack and 12.5KW / 440N.m torque drivetrain tends to make Ultra Bee https://sites.google.com/view/surron-2025/home