Sigma BC 2209 STS Triple Wireless + Alt Bicycle Speedometer Triple wireless bicycle computer that doubles as hiking aide Displays current speed, average speed, and maximum speed Measures actual, average, and maximum heart rate Measures current altitude, ascending/descending altitude, and max altitude PC-compatible; temperature display; adjustable to 2 wheel sizes Modern and multi-functional. This... 

SIGMA BC906 9 Function Topline Wired Bicycle Speedometer The BC 906 has everything a bike rider needs. Next to standard functions this all around computer is equipped with average speed. The computer is easily programmable with click buttons. If the battery is running low, a reminder alarms the bike rider before it is too late. User Ratings and Reviews 5...