Product SpecificationsLaser Wavelength 632 - 650 nmLED Type Visible red laserOutput Power <1 mWBattery Type AG3 x3Battery Type AG5 x2Battery Life 1 hourRange for Sighting 15 - 100 ydsDot Size 2 in @100ydOperation on/off end capMaterial BrassOperating Temp,?F/?C 14 to 122 / -10 to 50 F/C..