DETAILS FROM EOTECH:

The Laser Battery Cap (LBC) is a drop in replacement that fits all 512/552 EOTech Holographic Weapon Sights. Simply remove your existing battery cap and replace it with the new LBC and the lightning fast target acquisition you have come to expect from your HWS is expanded to include the versatility of an integrated visible red aiming laser.  This improved aiming capability will prove ideal for home defense or force-on-force training.

The LBC also features an integrated accessory port that allows for the use of a remote pressure switch, available for purchase separately.
 

Features
Product Details
Length/Width/Height:
2.7" x 2.7" x .96" (68.5 x 81.2 x 24.3 mm)
Weight:
4.05oz (115 g)
Waterproof:
Submersible to 10 ft (3 m) depth
Mount:
All 512 and 552 EOTech HWS
Power Source:
Two 1.5 V AA batteries
Lithium are recommended, run-time results with alkaline vary
Battery Life:
Lithium: 60 continuous hours at nominal setting 12 with laser on
Alkaline: 50 continuous hours at nominal setting 12 with laser on
Visible Aiming Laser:
Output Power: <5mW
Wavelenght: 635nm (Nominal)
Class IIIR
Fully adjustable windage and elevation