Vism SPD Solar Reflex Red Dot Sight /Quick Release Picatinny Mount Black. VISM designed these Red Dot Sights with a dual power source allowing you to harness the power of the sun with the top-mounted solar cell or use the included AA battery as a back-up option when there isn't sufficient sunlight. The Vism SPD 30mm Solar Reflex Red Dot Sight features 5 levels of brightness so that you can match the reticle to your ambient lighting conditions and the unlimited eye relief provides the most comfortable aiming experience possible. Equip the Vism SPD 2MOA Solar Reflex Sight for a power-efficient optic that will guide your aim on target with precision and ease. Specifications for Vism SPD Solar Reflex Red Dot Sight: Manufacturer: VISM Color: Black Magnification: 1 x Reticle: Dot Illumination Color: Red Eye Relief: Unlimited Emitter Type: Enclosed Battery Type: AA Gun Model: AR-15 Height: 1.5 in Condition: New Magnification Type: Fixed Red Dot Sights-Footprint: Not Applicable Mount Type: Picatinny Attachment Type: Picatinny Features of Vism SPD Solar Reflex Red Dot Sight: SPD has a dual power source. The Red Dot reflex optic can be powered by the sun via the top-mounted solar cell or the included AA battery. Solar cells mounted on top of the reflex sight will power the red dot whenever there is sufficient sunlight on the solar cells. The Red Dot automatically turns on when there is sufficient sunlight. The SPD Red Dot can also be powered by the AA battery. AA battery should be used when there isn't enough sunlight when using the optics indoors or when using the optic at night. The electronic control panel has a red LED indicator when the Red Dot is powered by the AA battery. Features an electronic control panel to turn on the Red Dot under AA battery power. You can adjust the brightness level up or down when powered by the battery. Red Dot centerline is at 1.5in AR15 height. Locking quick release Picatinny mount. Unlimited eye relief. LED 100percent safe for the eyes. 2 MOA Red Dot has 5 levels of brightness. Package Contents: Vism SPD Solar Reflex Red Dot Sight Vism VDBSOL130: SPD Solar Reflex Red Dot Sight /Quick Release Picatinny Mount Black