Serfas CP-USBS USB Silicone Combo Light Pack The industry's most technologically advanced safety lights All lights are robs compliant and all testing is done in house More efficient leds & high quality lenses to increase brightness & Clarity Includes USB rechargeable headlight and taillight Easy to use, easy to mount Water resistant silicone body and straps Modes: high, low and flash Run time: up to 8 hours (depends on mode)