Portable video borescope (videoscope) : 1.2.5" color monitor 2.Color camera of high resolution and compact size 3.1220mm Portable Video Borescope Features: Color camera of high resolution and compact size2.5" color monitor1220mm long shaft, 7mm shaft diameterInsertion tube of 1220 mm, probe diameter of 7 mmReal-time displayOperates over 3 hours with three AA batteriesProtection from water, oil, ...