YINGNEW HD Wide View Monocular Scope - 6X 21mm Mini Telescope - with Retractable Eyepiece + BAK4 Prism - Compact Monoculars for Spotting , Birding ,Hunting Multilayer broad blue film ocular lens: It adopts fully-optical glass lenses, coated with multilayer blue films, which can ensure an excellent light transmittance, minimize color aberration, and display a bright and clear image Compact design & mini size 3.93 * 1.18 in , lightweight 0.17lb , fits in your pocket and easy carry to anywhere Special Feature - Retractable Eyecup For Use With Or Without Eyeglasses. Come up with Carry Case ,Lanyard ,Lens Clothes and User Manual High Definition Optical Glass With Premium Fully Multi Coated All Glass Lens which guarantees superior light transmission and brightness for optimal bright, crisp, clear viewing No Slip Comfort Molded Grip Which Provides Less Shake - Very Easy To Hold Steady With One Hand