Features 1、Using military standard wear resistant artificial leather design, it is waterproof, antifog and moistureproof and can be used in harsh environments. 2、This is a telescope with an objective lens diameter of 50mm. The body adopts humanized design, small size, and non slip. 3、Antisweat texture, comfortable to hold, simple to use, compact and portable, suitable for outdoor and travel use. 4、The lens is made of all optical glass material, whose image image is incisive, bright, transparent with no chromatic aberration. 5、Fast focus pulley design, manual zoom telescope allows you to quickly and accurately obtain better viewing results. Specification Item Type: Monocular Telescope Model: 10-30x50 Single Tube Zoom Material: ABS+Optical Glass Purpose: Remote Observation Eyepiece Diameter: Approx. 22mm / 0.9in Objective Lens Diameter: Approx. 50mm / 2.0in Magnification: 10-30x50 Focus: Dual Focus Angular Field Of View: 5.6° at 10X ~ 2.7° at 30X Waterproof System: Nitrogen filled, Waterproof, Fogproof and Moistureproof Coating: FMC Full Broadband Multilayer Coating Package List 1 x Monocular Telescope 1 x Phone Clip 1 x Tripod 1 x Lanyard 1 x Lens Cleaning Cloth 1 x Tool Bag 1 x Manual