The UltraFlash USB lights from BikeSmart are designed to make you be seen! Feel safer riding at night knowing that you stand out and are visible to others. These lights incorporate side windows which allows for the light to be visible in a 270 arc around you. Available as a 50 Lumen front or a 25 Lumen rear, these lights can run for up to 6 hours in Low-Beam mode, or over 24 hours in the slow flashing mode. Includes a handlebar/seatpost mount and a micro USB cable for recharging.