Shootmy 4 Reticles Holographic Reflex Sight Red and Green Dot Scope 1x23x34, (Black) Durable high quality aluminum with alloy black matte finish, shock proof (1000g) and fog proof. A tubeless design with a 23x34mm reflex lens to provide a wide field of view, perfect for rapid firing or shooting on moving targets. Can be installed on a 21 mm pica tinny and weaver rail, available for most equipment. The device has 5 levels of brightness for red and green illuminated dot, multi-reticle (4 patterns) to choose. Powered by one 3V lithium battery with a low power consumption.