Specifications:Ultralight and portable.Mini and compact size, can ring on the finger to watch.Optic lens, high clarity and clear imaging and view.Item Name: Mini Compact TelescopeModel: 2.5x17.5mmMagnification: 2.5XField of Angle: 6.5Focusing Way: RotationField of View: 8m/600mEyepiece Diameter: 8mm/0.31" (Approx.)Objective Diameter: 17.5mm/0.68" (Approx.)Exit pupil Diameter: 16mm/0.62" (Approx.)Exit pupil Distance: 13.5mm/0.53" (Approx.)Size: 35mm x 22mm/1.37" x 0.86" (Approx.)Notes:Due to the light and screen setting difference, the item\s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Mini Compact TelescopeUltralight and portable.Mini and compact size, can ring on the finger to watch.Optic lens, high clarity and clear imaging and view.Great for practicing, match and casual playing.Perfect gift for professional players or the one who love sports.