Excellent camera used for underground,underwater,drain,sewer,pipe,duct,tubes inspection DUCT INSPECTION CAMERA SYSTEMTechnical specificationsCamera1. Color camera with sapphire glass ... Picture Resolution: 320 (TV Lines)2. OSD display3. Video output 1 App 75 OhmsSD DVR1. Recording format AVI2. ... x 19.5cm2. Camera Ø23mm x 120mm3. Cable Reel Ø32cm4. Total net Weight : 7.5 kg Duct Inspection Camera System