Geertop ALEVIN 10X21 Ultra-clear Mini Binoculars Telescope, Focusable, for Kids SUPER CLEAR TELESCOPE WITH HIGH QUALITY! Excellent ultra-clear lens, Focus adjustment rotary knob and Binocular parallax compensation adjustment ring, let you see the scene clearer and more realistic. MAGNIFICATION: 10X (enough for match watching, bird watching and so on). Objective Lens: 21mm. 21mm objective lens provides 10x magnification. MINI AND PROTABLE which make kids able to carry it anywhere. Binoculars Size: 100*80*50mm / 3.9*3.2*2inches. Binoculars Weight: 170g / 0.37lbs EASY USE! 1, Turn around the both Lens cones, so that both eyes can see a circular and overlapping field of view. 2, Close your right eye, turn the focus adjustment rotary knob at the same time until your left eye can see items clearly. 3, Turn the right adjustment ring so that the right eye can see the same image as clear as the left eye. MINI, CUTE DESIGE, LIGHTWEIGHT BINOCULARS FOR KIDS to Hiking & Birds Watching, explore the world!