Amazon.com : K&F Concept HD 12X42 Monocular Telescope for Smartphone, High Power Monoculars for Adults, BAK4 Prism IP68 Waterproof Compact Monocular Scope for Bird Watching Hunting with Phone Holder & Hand Strap :
Amazon.com : Nikon 7394 5x15 High Grade Monocular : Electronics
Amazon.com : Aurosports 10-30x40 Zoom Monocular - High Power Dual Focus Prism Compact Monoculars for Adults Kids, Lightweight Pocket Monoscope with Bak4 Lens Hiking Hunting Bird Watching Camping Gifts Black : Electronics