1 Nice Appearance: the door panel is made of 0.5mm color steel plate .hard frame, smooth lines, beatiful color, and luxurious style. 2 Good Quality: all parts are made of high-quality materials, do not use any lubricant for maintenance, durable for use. 3 Convenience: use Australian DC motor, remote controling or manually controling for choose, DC controling box, quiet and economice. 4 Security: no noise, automatic bounce for safing protection, burglarproof, wind resistant, fireproof, and automatic lighting system inside.