Nitecore TUBE Series is a small, EDC, LED keychain light with one-handed mutli-stage power button. Select from two brightness modes or an infinitely variable output mode by holding down the power button to the brightness desired. The Li-ion battery charges via a micro USB charging port with intelligent charging circuit. Made from durable poly-carbonate materials with a double steel key connector that can withstand 77 pounds. The perfect complement to your key chain load out.