adult kart specifications:
4kw DC special high torque electric racing motor,
chassis material:  30 ChromeMoly,
with differential,
with two brakes,
with manual adjustment torque switch(50%/80%),
control panel buttons of forward/reverse/stop and battery capacity display,
with lithium battery 48V/60AH,
quick charge AC battery 30 min for 45 min usage, 90 min charging for 2 hours use,
normal AC charge 5 hours for two hours use,
max speed 80km/h,
with 4 buttons remote control all karts for 3 speed(A:60 km/h, B:50 km/h, C:40 km/h, D:  Off) control,
instant stop and key start/stop,
front and rear lights,
with gasoline engine sound imitation,
size:1800mmx1300mmx1200mm,