A practical set of a front and rear light Topeak POWERLUX USB COMBO consists of the HeadLux 100 USB (front light) with 100 lumens output and the TailLux 25 USB (rear light) with 25 lumens output. Both lights have USB charging option. The Topeak TAILUX 25 USB features 4 light modes and 3 fastening options. The EPDM straps allows two-way mounting without using tools. The light is helmet and seat post compatible. The low profile Topeak HeadLux 100 USB is efficient and easy to handle. It features 4 light modes with a varying light intensity which is reflected on the battery life that can be easily charged through the USB cable. The lights come with a simple helmet or handlebar handle.