I. Product features: Major focus handwheel design, plug and pull type objective lens dust cover; Using ergonomic design, the design is compact and fashionable, portable and lightweight You can watch it alone, or take photos and videos by connecting your mobile phone with a connecting ring. Full multi-layer coating BAK-4 roof prism, stable imaging, clear color; IPX6 nitrogen-filled waterproof, durable; Application fields: outdoor tourism, field exploration, sports events, concert, electric power safety inspection, forestry investigation, security and police, military patrol, industrial inspection, navigation observation, archaeological research, railway selection, land and resources investigation, etc. II. Product parameters: Multiple: 10 x Objective lens diameter: 42mm Prism type: BAK4 Number of lens sets: 8 pieces and 6 sets Lens coating: FMC Focus system: medium Exit pupil diameter: 4mm Exit pupil distance: 15.2mm View: 5.8 Field of view in km: 102m Latest focal length: 2m Relative brightness: 18.23 Evening Index: 20.4 Diopter: �±5 Eyepiece distance: 56-74mm Nitrogen - filled waterproof: IPX6 nitrogen - filled waterproof Mesh structure: knob Size: 127 x53x150mm Weight: 580.7 g Tripod: Supported (optional, universal camera tripod interface) Accessories: telescope, eyepiece cover, objective cover, portable soft bag, bracelet, mirror cloth, manual, warranty card, color box