Liberty II 1x22mm Green/Red 3 MOA Dot Sight. 24mm objective lens and slim profile make Liberty II ideal for everyday active use. Shake N’ Wake technology shuts down illumination after abut 225 seconds without movement. Once movement resumes illumination immediately resumes to prior setting. Compatible with duty grade holsters. Silver lens is fully multicoated with anti-fog, anti-scratch, and hydrophobic coatings, resulting in great daylight bright performance. Built to last with 7075 Aluminum construction and stainless steel top mounted battery cover.