UTG ACCU-SYNC dot sights come in a compact and subcompact size and feature a red illuminated 3 MOA dot with 8 manually adjusted brightness intensity settings to choose from. Illumination memory conveniently gets users right back to the last brightness setting used upon activation. Fully sealed, ACCU-SYNC dot sights are IPX7 waterproof rated and constructed from matte black anodized 6061-T6 aluminum. Optimized for low power consumption and powered by a single CR2032 battery, a 30,000+ hour battery life (at middle brightness) comes standard.