The SPARC SOLAR harnesses the power of the sun for up to 150,000 hours of battery life. Auto D-TEC technology automatically switches from solar to battery power when the sun can’t power the dot to your choice of 10 daytime illumination settings and two night-vision compatible settings. Its daylight bright, 2 MOA dot delivers a clear, precise point of aim, and is motion activation capable for worry-free activation in high stress. situations. Automatically switches from solar to battery power. Automatically activates with motion after auto shut-off.
Key Features:

• Daylight Bright Illuminated Center Dot
• Fully Multi-Coated
• Unlimited Eye Relief
• Parallax Free
• Night-Vision Compatibility
• Single-Piece Chassis
• Low-Glare Matte Black Anodized
• Waterproof
• Shockproof
• Fogproof
• Solar Powered, With Auto D-TEC Technology
• Motion Activation Capable

Fully Multi-Coated
Increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces.
Unlimited Eye Relief
Non-critical eye relief for rapid target acquisition
Parallax Free
All red dot and holographic sights will exhibit some small amount of parallax. Matching current industry practice, this small amount would be considered "parallax free" and will make a negligible difference in performance.
Night-Vision Compatibility
The lowest 2 settings are night-vision compatible.
Single-Piece Chassis
Compact and lightweight.
Waterproof
O-ring seals prevent moisture, dust and debris from penetrating for reliable performance in all environments.
Shockproof
Rugged construction withstands recoil and impact.
Low-Glare Matte Black Anodized
Corrosion and wear resistant anodization provides low-glare matte surface.

In The Box Vortex Optics SPARC Fully Multi-Coated Solar Red Dot Sight, 2 MOA Dot with Wearable4U Bundle (May Vary)