The HWS EXPS3 is an excellent choice for professionals. The EXPS3 offers true two eyes open shooting for fast target acquisition night vision compatible settings and a 7mm raised quick detach base for lower 1/3 iron sight co-witness. – Included in the box: – HWS EXPS3 – Quick-Start Guide – Warranty Card – CR123 Battery – Protective Case – L X W X H 3.8 x 2.3 x 2.9 (96.5 x 58.4 x 73.7 mm) – Weight 11.2oz (317.5g) – Water Resistant 33ft. (10 m) depth – Mount 1 Weaver or MIL-STD-1913 rail – Windage & Elevation Adjustment 0.5 MOA per click – Brightness 20 daylight settings 10 additional settings for Gen I through III+ night vision devices – Power Source 1 x CR123 battery – Battery Life 1000 continuous hours at nominal setting 12 at room temperature – Operating Temperature -40°F to 140°F (-40°C to 60°C)