Exceptionally comfortable to use during long periods of observation and viewing. Lightweight, extra-long viewing range of 4 to 600 feet, and a wide 1.8-degree field of view makes these binoculars ideal for law enforcement, night navigation and wildlife surveillance. With Bushnell Night Vision, time will never again dictate your hours of operation. These optics turn night into day with built-in infrared illuminators and advanced light-gathering technology. The Bushnell 2.5 x 42mm Night Vision Binocular is perfect for camping, caving, wildlife observation, surveillance - any time or place you think you're ready. Requires 2x AA batteries (not included).