*Operation part: Visual Field:90° Visual direction:0° observe depth:3-100mm Intubation Tube out diameter:3.8mm effective work length:600mm curved angle: upward 110° downward 90° resolution ratio:320*240 pixel:600,000 pixels *Monitor : LCD size:3.5” TFT LCD, Color: True colorful Revolve angle: Up to down 0-130°,left to right 0-260°