MDN 12X40 World's first integrated Gen. 2+/3 Day/Night monocular makes life easier for those who want to use optics 24 hours a day: from bright sunny daylight through misty twilight to total darkness. Day/night integrated monocular combines a perfect clear daytime optics with advanced night vision image intensified technology. Large fast lenses, coupled with high quality image intensifier tubes and wide field of view contribute to the best image possible. The built-in infrared illuminator allows observation under extremely dark conditions or even in total darkness. The device is very easy to use: you should just push a single slider to switch between day and night modes. Ergonomic, lightweight, weather and shock proof, MDN 12x40 is the only compact and robust Day/Night device currently available on the market. Product Accessories: Lens cap Case Strap User manual Warranty card Product Features: Rubberized body Compact and lightweight Automatic shut-off Built in infrared illuminator Weather resistant Specifications Generation Magnification Field of view Dioptric correction Operating temperature Objective lens Power supply Battery life, hours Dimensions, mm Weight, kg   2+ or 3 Day Night 12 3.5 4° 14° ±4 -40°C to +55°C 39.2mm 1 CR123 65 (without I/R), 18 (with I/R) 173x95x51.5 0.6