1.Variable ratio electric engine gearbox 2.Body material,aluminium alloy and ... for gears,motors Features, 1) High precision of speed regulating for electric engine gearbox,precise exact to 0.5-1 round2 ... ) Compact structure, small size8) Based on the rated motor power,assorted as UDL0.18,UDL0.37,UDL0.55,UDL0 ... to acquire the needed ratio change 10) Rated motor power,0.18---7.5kw Basic information,