12x Optimal magnification - The magnification of binoculars is generally 7-14 times. The higher the multiple, the worse the definition. Too high magnification will cause the picture to shake, and too low will cause the picture to blur. Therefore, it is generally recommended to choose a telescope with **12 TIMES**! 18mm Large Eyepiece Binoculars, More Details - The 18mm eyepiece can maximize the advantage of 12x lens to bring you best impression. It is your best choice for Watching Concert, Sports, Bird, Marine, Whale, Astronomy, Stargazing and Planets etc. 18mm Big BAK4 Prism Lens Binoculars - The telescope get 32% more light than 12.5mm prism lens (e.g. 10x25, 12x25, 10x21 binoculars), 13.7% of 14.5mm prism lens (e.g. Ordinary 8x42, 10x42 binoculars). 18mm Prism lens take 99% advantage of 42mm objective lens, can deliver clear vision in weak light condition, but not in completely darkness. Perfect for Hunting or Concerts at night. Durable Framework and Rubber Armor - Durable body with rubber armor for shock-resistance, 100% waterproof, anti-skid, firm grip. Excellent structural design and precision assembly make it perform well in waterproof and dust resistance. This binocular is must-have equipment for outdoor activities. pick up at my address .first come first served, advance payment can be reserved. I'm in Franklin South.