KRY COMBO ALLEY F-800/AVENUE R-75 USB BLACKUSB rechargeable 800 lumen headlight and 75 lumen COB tail light combo pack Both lights feature 6 modes , 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