USB rechargeable 150 lumen headlight 6 modes per light: High steady, Medium steady, Low steady, Daylight pulse, Nitelight pulse and Economic Flash Memory function-light turns on at the last mode it was turned off Power saving function: 10% power or less, lights will automatically switch to lowest lumen output Built in battery indicator- Red illumination = lower than 25%, Green = fully charged Side illumination ports allow cyclist to be seen when riding across traffic lanes