Steiner 398 10 x 50 Military BRF Binocular RF Steiner 10x50 Military Laser Rangefinder Binocular Built-in laser rangefinder with LED readout accurate to 5% @ 1,600 yards and within 1 yard at 380 yards Steiner superior porro-prisim design meets and exceeds all mission critical levels for all surveillance tasks Completely sealed and pressure-filled with dry nitrogen this binocular is fully submersible to a depth of 16' resisting water, fogging and dust Configured with mil.spec lenses and premium BAK4 porro prisms giving optimum performance in depth perception, clarity and detail