30 Lumen tail light that can be mounted vertically or horizontally Modes include High Steady, Low Steady, Daylight Pulse, Nitelight Pulse and Economic Flash 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 Black 5 Rear Rubber Strap USB 30UPC/EAN/GTIN: 720018003656