Features: 1) Electrical restriction2) Uses aluminum alloy guide track, operated smoothly, with low noise3) Bigger torque, saves more electricity, consumes 4W4) When meeting the obstacle, it automatically reversedly moves 15cm5) International advanced coding technology is adopted in the remote controller of open motor, coding capacity exceeds 100,000,000mAh Inner packing: Foam plastic board and plastic bag Outer packing: Strong carton Conveyance: Qty/20' FCL: 500-750 sets Qty/40' FCL: 1,000-1,500 sets