zvd 10 300x40mm portable mini monocular telescope extendable zoom waterproof bak4 prism camping equipment phone

portable 10 300x40mm mini monocular extendable telescope zoom waterproof bak4 prism camping equipment phone lens material bak4 glass magnification 10 300x diameter of objective 25mm diameter of eyepiece 12mm main hands 1. high magnification the magnification is upgraded 10 times 300 times, it can pr