Red Green Dot Reflex Sight Scope 553/558 Tactical Holographic Optic 20mm Rail UK
Battery: 552: 2X14500 Battery, 553: 2X CR123A Battery. 553: Red and Green Reticle with 10 Levels Brightness. 558 scope is a holographic scope. Its red and green dots are relatively large. 553: Length: 93x56x62mm (L x W x H).