3.5 inch monitor and long-life LED light source. Working length：600mm Depth of field:3-50mm Range of bending:U160°D130° Insertion tube outer diameter:φ 4.0mm（without instrument channel）/φ 4.8mm/φ 5.7mm Easy to operate, equipped with a flexible ergonomic handle Long-time working with rechargeable lithium-ion battery Widely used, applicable to anesthesiology, respiratory, ENT, ICU, emergency room, wards and etc Portable recording, 16GB SD-card supports for storing of images and videos