CNC machined AL6061-T6 alloy body with a CREE 50 lumen red LED CNC machined AL6061-T6 alloy body with a CREE 50 lumen red LED 3.7V 200mAh USB rechargeable Li-ion battery powers the light for up to 15 hours 4 light modes including solid, slow flash, fast flash, and burn Frame/seatpost mount is integrated in to the body of the light Includes USB charging cable and a rubber strap to mount the light IP65 certified water resistance