-power safe feature, automatic power-off in 2 hours -Easy to setup, fits any 20mm rail -Elevation and Leverage adjustment on the side of sight -Colour: black -Battery: 4 x LR44 batteries -Dimension: 10 cm (L) x 5cm (W) x 6cm (H) -Weight: 220g -A: brightness adjustment (upward) -B: brightness adjustment (downward) -C: Reticle colour switching (Red / Green)