Spike Tactical Reflex Red Green Dot Sight Scope w/ Dual High / Low Profile Rail Mounts Airsoft Hunting Durable all metal construction.Allow for precision windage and elevation adjustments High profile mounting option with the 1" rail riser.Rail riser compatible with both 20mm and 11mm dovetail rails.Build-in low profile mount for 20mm Picatinny / Weaver rails Red or green dual illuminated dot reticles with brightness control Lightweight, dust-poof, weatherproof, and shockproof Note:without Battery 5 level illuminated for both Red/Green dot , Powered by one piece of CR2032 cell(<span class="a-text-bold">not included</span>) Specifications Elevationand Windage adjustment knob . Covered withAluminum alloy cap Additional Reversible rail riser , fit for both 11/20mm rail . Make this item suitable for most gun tracks .