Stunning white light HDTV picture performance and enhanced NBIInsertion tube rotation functionFully waterproof endoscope and one-motion connector Optical system Field of vision 120ºvisual direction 0ºDepth of field 3–100mmHDTV picture qualityInsertion section Outer diameter ofdistal end5.5mmTube outer diameterinsertion5.1mmworking length 600mmtube rotation functioninsertionYeahBiopsy channel Internal diameter of the channel 2.0 mmMinimum visible length 3 mm from the distal endDirection in which accessories enter or exitEndotherapy in the endoscopic image