Aiming dot size: 2 MOA nBattery type: One AAA size 1.5 V Alkaline LR03 or Lithium FR03 nBattery life - Day time use: 5 years (50 000h) of continuous use at pos. 7, more than 1 year at pos. 8 and more than 10 years at NVD-setting (pos. 1-4)