The kLite QUBE USB is a ADD ON to the ULTRA Race kit, its powered from the USB port on the kLite charger, or USB cache battery with low power mode. Now 40% brigher with 180deg beam width. Constant or flashing modes via SUPPLIED dongle.Need internal wiring? No problem, we now offer a KIT made for internal wiring of the power lead, however you need to solder on the USB PLUG once you feed the wire thru.Using the kLite USB always ON wire wire loom, you get rear light safety day and nite with fully auto start and stop function, the kLite wire loom allows the rear light to be on when the main front light off, this allows more USB recharge in the day, compaired to having the main light on at the same time.STD rear is ~1m