E-Tech system 552 red / green reticle holographic sight.
 
The 552 advanced sight is made from aircraft grade aluminium and has a non reflective matt black finish. The 552 will fit on any standard RiS, picatinny or weaver rail. 
 
The sight features a rear-facing keypad for on/off, reticle colour and brightness controls. This version of the famous 552 holographic sight is fully adjustable for windage and elevation via the side mounted adjustment screws. The sight is powered by two AA batteries, these are stored in an easily accessible battery compartment that is securely locked in place by a lever – allowing for quick battery replacement.
 
* Brand new and boxed.
* Great for airsoft, paintball, air rifles and crossbows.
* Easy to setup - fits any 20mm RiS, weaver or picatinny rail.
* 10 adjustable brightness levels, red & green reticle sight.
* Side mounted windage and elevation adjustments.
* Made from tough, shockproof and weatherproof aircraft grade aluminium.
 
Dimensions:
Overall length: 135mm. 
Overall height: 62mm.
Width at widest point: 50mm.
Weight (including installed batteries): 295g.
 
Button configuration:
Up: Power on and brightness adjustment up.
Down: Brightness adjustment down.
Up + down: Power off - depressing both keys simultaneously.
NV: Switching between the red & green reticle.
 
Package includes:
1 x Red & green illuminated reticle 552 graphic sight.
1 x Screen cloth.
1 x Instruction sheet.
 
* Requires 2 x AA 1.5v batteries or equivalent (not included).
 
Please note:
Some people with certain eye conditions especially "Astigmatism" may not be able to see a single, in focus reticle image when using reflex type holographic sights. Astigmatism means your eye is shaped more like a rugby ball than a football so light is focused at more than one place in the eye. This can cause blurred vision, eye strain and also effect a persons ability to correctly see TV screens, computer monitors and also reflex type sights and scopes.