YINGNEW 8 x 21mm Compact Monocular Telescope Scope Waterproof 8x 21mm precision focusing system,simple to operate and easy to focus Compact and Lightweight Design,1.18*3.67 inches fits in your pocket thats provides quickly take the monocular from your pocket while you see a bird in the forest Eye-safe,the BAK-4 prism glass makes clear and sharp images Ergonomic Design: contains the monocular are 3 fingers groove and 1 thumb groove ,to ensure the most comfortable grip even if longtime use Pretty Present for who loves Camping, Bird Watching ,Hunting,Hiking, Fishing and etc