Nitecore TUBE black 2 pack of 45 lumen USB rechargeable keychain light with EdisonBright USB powered flexible reading light bundle High performance LED produces 45 lumen on high Built-in rechargeable Li-ion battery provides a runtime of up to 48 hours on low Integrated intelligent Li-ion battery charging circuit (micro USB charging port) Features two brightness levels and infinitely variable output mode This bundle includes EdisonBright USB powered flexible reading light