The tracer is a super bright usb charging rear light new to the range and partner to the trace its compact design high power and ultra reliability make this a winning product the tracer features optimum mode selector offering 3 brightness modes and the choice of solid or pulsing beams the tracer also has fuel gauge displaying the remaining battery life using a traffic light system to make it clear when its time to recharge great side visibility will make sure youre seen and safe out on