This is the Braun 8x42 Waterproof Monocular with Compass Black [BNBL20140] The Braun 8x42 Waterproof Monocular with Compass Black (BNBL20140) is the ideal companion for outdoor activities either onshore or offshore. The Monocular also features an inbuilt compass and a cross line for distance setting. Specification: Lens System: Ultra lit glass objective Prism: Roof BAK-4 Focusing: Central focusing Magnification: 8X Lens Diameter: 42mm Exit Pupil: 5.25mm Eye Relief: 18mm Field of View: 7 degrees 122M/1000M Close focus distance: 13M Dioptre adjustment: -4/+4 Waterproof ( Maximum depth/time): 0.5M/ 20mins Nitrogen filled: Yes Eyecup system: Rubber pop-up ( fold down eyecup) Dimensions : 61x65x143mm Weight: 340g Supplied with case, wrist strap and instruction manual ...Contact us if you need more help.