The Sigma BC 1009 STS Wireless Bike Computer 

Wireless, simple to operate, and precise. The BC 1009 STS has all the essential functions including average speed, maximum speed, current/average speed comparison, and total trip time.

Features/Benefits:

• Wireless transmission
• Bike functions: 
• current, average, and maximum speeds
  
• trip distance
• current/average speed comparison
• total distance
• ride time
• clock
  
• total ride time
• Faster data synchronization: shorter transmission intervals guarantee faster screen updates, providing more accurate data
• Battery lifespan of at least one year
• Auto start/stop
• Large display with easy to read icons
• Low battery indicator and integrated storage chip; you won't lose your settings or total values during a battery change
• Operates on a single 3V lithium battery (included)
• Weatherproof 
• Can accommodate optional heart rate sensor and cadence sensor (sold separately)