New XL CNC machined aluminum body with ridges for increased surface area to dissipate heat. USB rechargeable via an integrated USB port concealed on the bottom of the light. Maximum Optical. Reflection lenses produce an improved beam that is wider, smoother, and brighterUnique design allows side visibility increasing safety at night. Intelligent Power indicator button allows the user to check the power level any time. Composite Matrix wrap around mounts for 25.4 31.8 bars. Li Ion battery that is replaceable.