The image-stabilized Fujinon 16x40 S1640D Stabiscope Binoculars use gyroscopic stabilization to counteract any movements applied to the binoculars, whether from shaky hands or speeding watercraft. Unlike other stabilizers, the Stabiscope binoculars' ±5° of compensation will work with the optics aimed along any axis. A user can aim the Stabiscope straight up or down, at the zenith or nadir, and still enjoy stable viewing, making the Stabiscope the most sensible choice for law enforcement use from a helicopter. This 16x magnification unit is designed for longer-distance observation, with a 167' minimum distance. The Stabiscope also is compatible with multiple power sources. They can be powered with 12-32 VDC electrical systems found on most land, sea, and air vehicles, as well as four AA batteries or a single 2CR5 battery. The Stabiscope binoculars are designed for either left- or right-hand use, and optional accessories include polarizing filters and eyecups. Features: A 100% waterproof and fogproof stabilized binoculars ±5 degree all-direction motion compensation Stabilization works with binoculars pointed in any direction, including straight up or down Phase-coated BAK4 roof prisms Full Fujinon EBC multi-coatings on all optical surfaces Accepts optional haze eyepiece filters Designed for either left- or right-hand use Rubber-armored housing 60-70mm interpupillary adjustment range ±5 dioptric correction Adaptable to DC power sources, as well as AA or 2CR5 batteries Peel-down-type eyecups Enhanced 16x magnification