The Sig Romeo 4B is the perfect sight for use on hunting and tactical rifles. It provides a crisp sight picture with zero distortion with a circle dot, unlimited eye relief and parallax free point of aim for rapid target engagement. The side loading CR2032 battery will provide 50,000+ hours of continuous run time and the MOTAC feature will turn the Romeo 4 on when it detects motion and off when it doesn’t. The housing is made from durable and lightweight aircraft grade CNC aluminum and it is waterproof up to 1 atmosphere. Lastly the Romeo 4 comes with the Sig Infinite Guarantee.