The amount of time it takes for the LED to deactivate (enter Sleep Mode) is user programmable. Holosun optics with Solar Failsafe feature automatic brightness adjustment; when you're under the sun you have a bright reticle, when you move indoors it will automatically dim down to match ambient lighting conditions. This item is in the category "Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser".
The seller is "cinmanadvantage" and is located in this country: US. This item can be shipped to United States.