Due to different lighting effects and environments, display brightness settings, etc., the color of the actual item may be slightly different, please refer to the actual item. Regarding the size, please allow a difference of 1-3 cm due to manual measurement, thank you for your understanding! A light that easily fits into the pocket of your running shorts or vest and is virtually unnoticeable on your head the Black Diamond Sprint225 is purpose-built to power fast-paced morning runs or post-work trail sessions. With 225 lumens on the max setting with an average 2.5 hours of burn time the lithium battery is rechargeable via USB and the light's proof IPX4 rating protects against rain and sleet from any angle. In addition the Sprint225 utilizes our updated optical efficiency which provides brighter light with more peak intensity plus now you can easily track battery life with a six-setting three-LED batter meter. The Brightness Memory feature allows you to turn the light on and off at a chosen brightness without reverting back to the default setting and the Sprint225's PowerTap Technology makes for instant brightness adjustment with the tap of your finger. Finally the light's vari-width headband is lightweight packable and stays comfortably in place on high-output runs. After-sales service: If you have any comments or suggestions on the product, please feel free to contact us, we will reply you as soon as possible. For more related products, please search , we will serve you wholeheartedly!