Battery powered super-bright Busch & Muller D Toplight Permanent 4 LED Rear Light that mounts to a rear luggage carrier. It features a low battery indicator 2 position switch and integral wide angle reflector for added safety – 4 LED Version. Perfect for you daily commutes.* Please note that this product comes with packaging that states it comes with 2 LEDs although there are in fact 4 LEDs. 2 on the front and 2 on the side.