The LED kit for loupes improves lighting, making it easier to see up close when using loupes. The LED kit includes: light, 2 rechargeable battery packs with rheostat, filter, cord holder, velcro strap, carrying case, attachment clip, and instructions. The LED kit is a nice alternative to high priced LED lights on the market. It’s light weight and can be adapted to fit any loupe system. Uses a solid state LED lamp with 100,000 hours of life. Illuminates at 70,000 lm with intensity of 140 lx. Average operating time of 5.5 hours and recharge time of about two hours.