... Pipe inspection: Robotic crawler:Model: SD-9902Brand: SLD *Components:Camera head, Crawler, Display controller, Cable Reel, Wheel, System ... data of running speed, distance, crawler internal, and camera internalpressure index, two axis Angle measurement, lighting source numerical ... rises or falls, main and auxiliary light switch brightness to adjust, cameraoptical zoom, focus, and aperture control.3). ...