The HS403R can achieve a constant "on" battery life of up to 100,000 hours. Includes lower 1/3 Co-witness mount, T10 L key, low profile mount, rubber cover, CR2032 battery, lens cloth and user manual. This item is in the category "Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser". The seller is "tekusnow" and is located in this country: US. This item can be shipped to United States.