BLITZ MODE - Whether you are in the darkest alley or on the brightest street, Blitz Daytime Running Mode was designed to help you be seen on your bike and keep you safe, day or night. LED FUEL GAUGE/CHARGE INDICATOR - A small, built-in LED light indicates the battery level. Green => 75%, Orange = 75 - 25%, Red =<25%. IP-67 SUBMERSIBLE - Ingress protection rating or IP rating, is a techy way to describe the level of water and dust proofness a product has. This light meets the IP-67 standard, which means is totally protected against dust/grit and is fully protected against the effects of immersion between 15cm and 1 meter for 30 minutes.