The articulating bicycle mount allows the Guardian to be used on either the front or back frame of any bike. Like all Adventure Lights products, it is extremely rugged and easy to use. Simply flip over the battery to change from steady on to flashing mode. Whether on a dark highway or the woods, the Guardian allows you to see and be seen. Normal battery life is over 250 hrs in flashing mode. The locking Belt Clip is include with all Guardian products.