The Sigma(R) BC 1606L computer serves the needs of the most demaning riders, especially those who ride at night--and it's wireless! Backlight offers optimal readability even after nightfall. The digital radio speed sensor works without the need of a wire running between computer and fork--a great look for a lean, mean speed machine. An integrated storage chip prevents the loss of settings and total values during a battery change; low-battery indicator alerts you to make the change. Total values for time and distance are hidden while you ride, allowing you to focus more easily on functions necessary to the ride. Provides a programmable trip section counter and countdown timer. Plus, with Cadence and Bike 2 Sensor accessories (sold separately), you can monitor rpms and track total time and distance for a second bike. The BC 1606L also tracks the total accumulated distances of bikes one and two added together.