Advanced optical lenses for even better light transmission; Front Flip-up lens cover is included; Transparent rear Flip-up lens cover is included; Compatible will all generations of Night Vision Devices (NVD); 1 Off position, 4 night vision compatible settings and 8 daylight settings - one extra bright for use with laser protection glasses or in bright desert sunlight; No mount; ACET technology allows 50,000 hours (over 5 years) of constant operation with one battery; Submersible to 80 feet (25 meters); Use as a standalone sight or piggybacked on larger magnifying, thermal, or night vision optics; Hard anodized non-reflective finish