Sigma Sport Bicycle Computer - How to Set Wheel Size - YouTube
Sigma Bike Computer, Originals BC 10.0 Wired, 10 Functions incl Temperature, Multi Day Tracking, Large Display, Weatherproof, Long Battery Life, Flexible Mounting, Easy Installation, Operation
SIGMA 1200 Plus 12-Function Wireless Watertight Bike Computer 1200plus 4016224019205 | eBay