Sunagor Micro Zoom Binoculars 9-45x21 Very high power 9 to 45 times magnification zoom in an ultra compact pocketable size Highest quality BAK-4 prisms with multi-coated optics for a bright glare free image Sliding zoom lever for instant zooming and centre focus knob for quick, sharp focusing Built-in dioptric eyepiece correction to suit individual eyesight Smart metallic black/silver finish