BNISE Monocular High Power Scope with Reticle for Rangefinder, 13x50 Bright and Clear Range of View, Simple Hand Focus, Waterproof, Fogproof, Telescope-bak4 Prism for Adults Bird Watching or Wildlife Low-light night vision features a wide field of view by faint light, starlight or moonlight. Note:It's Faint Night Vision telescope,need light. Cannot be used in all the dark environment. 50MM large objective lens, high light transmittance, clear and bright image, no color difference, outstanding glimmer effect Excllent quality optical lens - objective and ocular lenses. One solid focusing ring. Single hand operation. Multi-coated ultra-clear film FMC broadband,bright color transparent, high transmittance, no color difference Built-in ranging reticle, ranging slide rule function BNISE Worldwide Warranty - 100% MONEY BACK GUARANTEE: You are protected by a lifetime, no-questions asked, money back guarantee along with world class customer service!