Modes include high flash, low steady, daylite pulse, nitelite pulse and economic flash Fully USB rechargeable — no batteries to buy or replace Run time up to 7 hours 30 mins Side illumination ports allow cyclist to be seen when riding across traffic lanes 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 Run time in eco mode = 7.30 hours Run time in high flash mode = 1.30 hours