AENMIL 10-90x25 Dual Focus High Powered Monocular Telescope for Bird Watching, Watching Wildlife or Scenery, Bright and Clear Range of View, Compact and Lightweight Portable Design Multi Coated optics guarantee superior light transmission and brightness This product have dual focus capability (front and back adjustable zoom) Powerful, ultra-compact and ultra-lightweight, Single hand operation easy focusing Suitable for Golf, Camping, Hiking, Fishing, Bird watching, Concerts, etc. Note: It's Faint Night Vision telescope,need light. Cannot be used in all the dark environment.