DN 310 DN 310 is a multipurpose instrument, which is suitable for both civilian and law enforcement applications. The model includes many features that are usually sold as add-ons, such as close focus ability, automatic brightness protection and manual brightness override. The unit withstands 500g recoil. It has long eye relief and low power consumption. Optional lens, which doubles the magnification, is sold separately. Besides its main designation, the unit can be used as an excellent lightweight hand-held viewer or a night vision attachment to a camera / camcorder. Product Acessories: Rubber eye guard / Lens cap Soft padded carrying case Camera adapter (optional) Video adapter:(optional) 2x Doubler (optional) User manual Warranty card Product Features: Water-resistant Long range of vision Automatic brightness protection Camera/video adaptable Precision internal windage/elevation adjustments Long eye relief Low power consumption Specifications Generation Magnification Field of vView Dioptric correction Objective lens diameter Power supply Battery life, hours Dimensions, mm Weight, kg   2 2.8 (5.6) 17° +3 -4 53 mm 2 AA 60 (Without I/R) 20 (With I/R) 225x82x74 0.970