The trace features optimum mode selector offering 3 brightness modes and the choice of solid or pulsing beams the trace also has fuel gauge displaying the remaining battery life using a traffic light system to make it clear when its time to recharge excellent side visibility will make sure you39re safe and seen out on the ride optimised mode selector oms the optimised mode selector allows you to easily select from a concise number of programs to optimise the burntime of your light fuel