The high tech pinhole Laparoscopic lens w/ eye view, measuring only 0.31-Inch in diameter, can be hidden behind walls or ceilings for covert applications. Using the most advanced optical design, the tube of the pinhole lens contains several lens elements to ensure crystal clear imaging. The lens features a fixed focal length of 6.5mm and provides 81° angle of view. As with all Marshall lenses, carries a full one-year warranty.