Used once, excellent condition, comes with a battery. Both green and red dots. 11 brightness settings. Adjustable for windage & elevation. Mounts to standard picatinny rails, durable aluminum alloy metal construction with full trademarks. Accepts CR123A batteries. Selling only because I have astigmatism and the dot appears double for me even though there is only 1 dot. Please stop asking for trades thanks. Buyer pays small shipping fee.