551 Features:

• 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  

• Battery: 4 x LR44 batteries

• Dimension: 10 cm (L) x 5cm (W) x 6cm (H)

• About Weight: 220g

• A: brightness adjustment (upward)

• B: brightness adjustment (downward)

• C: Reticle colour switching (Red / Green)

Package Includes:

• 1 X Red Dot Sight

• 1 X Instructions

• 1 X Cleaning Cloth