Sigma sport BC906 Easy to use computer, easy to install. Features; speed, total distance, trip distance, clock, ride time, max speed, and total time. programable to your wheel size. Great gift idea! Set goals, map our routes, keep up the pace. Battery operated (included) battery life is about 1.5 years. Item is in stock and ready to ship today! Happy Riding! Free shipping on orcers over $100! Al's oneliner (A drop of ink may make a million think.)