Welcome to my shop Observation OpticsAllows you to read data directly. The vertical baseline of optical observation improves accuracy and reduces errors. Fluorescent DesignThe bright and pink magnetic arrow of the compass allows you to read the data in a dark environment after absorbing enough sunlight. Compass and Goniometer Functionit is also a goniometer, able to measure height and slope. Multifunctional Metal CoverFoldable, floating compass dial with 360 graduation, adjustable prism lens, shockproof and waterproof. High Strength Engineering MetalAble to work in extreme weather conditions, suitable for camping, climbing, boating, expedition, hunting, hiking, geology and other activities outdoors. Features: Thermo-elastic liquid capsule with floating dial Rotating ring Scale measurement units on sides: inches and centimeters Integrated spirit level Foldable thumb ring Screw hole for a foot on the base Diopter adjustment riflescope on the lid line Conversion table for angle and distance on the back plate Notes: 1.The compass cannot be put too close to the magnetic field, otherwise the pointer will be disturbed. 2.Luminous effect refers to phosphor powder under natural light, fluorescent lamp, etc. The longer the irradiation time, the more durable is the light indication. No light, no fluorescent effect.