1、The body is made of aluminum alloy frame, and the appearance is designed with skin‑like lines, which is more comfortable and firmer. 2、Equipped with a smartphone adapter and a tripod, the telescope is transmitted to the high‑definition mobile phone telephoto lens, compatible with all smart phones. 3、The sturdy frame is coated with shock‑absorbing and non-slip rubber armor to ensure that your monocular telescope can still provide you with the best performance under various temperature and weather conditions. 4、The low‑light level night vision built‑in design helps you see things clearly in low light or dim conditions. 5、Large BAK‑4 prism and fully coated lens elements, light reflection and minimum distortion, better image brightness, contrast and quality. Item Type: Monocular Telescope Model: 10-300x40 Monocular Color: Black Material: Aluminum Alloy + Glass + Rubber Uses: outdoor distance measurement, object observation Zoom: 10-300 Objective Lens Diameter: Approx. 40mm / 1.6in Eyepiece Diameter: Approx. 20mm / 0.8in Field of view: 45.5-80.5M/1000M Exit Pupil Diameter: Approx. 1.2-1.7mm / 0.05-0.07in Exit Pupil Distance: Approx. 17-14mm / 0.67-0.55in Prism Category: BAK4 Focusing Method: Stretch or Rotate Optical Coating: FMC Coating Field of view: 2.4° x 10X/2.1° x 300X Focusing Method: Lens Body Adjustment Recent Focus: 2.2 1 x Monocular Telescope 1 x Tripod 1 x Phone Eyepiece Holder 1 x Cleaning Cloth 1 x Manual 1 x Carrying Case 1 x Lanyard