2 LED USB rechargeable tail light 5 modes, High steady, Low steady, Daylight pulse, Nitelight pulse and Economic FlashSide illumination ports allow cyclist to be seen when riding across traffic lanesMemory Function-Light turns on at the last mode it was turned offPower saving function- 10% power or less, lights will automatically switch to lowest lumen outputBuilt in battery indicator- Red illumination = lower than 25%, Green = fully chargedMultiple mounting options-Vertical or Horizontal mounting options as well as clip for mounting to packs, bags, or beltsBlack5RearRubber StrapUSB45UPC/EAN/GTIN: 720018003663