Will my cadence reading be derived from my PowerTap Power Meter or from the GSC 10 Sensor?

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When using an Edge 810, 800, 705, 510 or 500 that is paired up to a PowerTap power meter and a Garmin Speed/Cadence bike sensor (GSC 10), it may be noted that both accessories are capable of transmitting cadence.

When using a PowerTap hub and a GSC 10 sensor at the same time, the Edge devices will report cadence through the GSC 10 sensor. However, if the GSC 10 sensor is not present, cadence will be reported through the PowerTap hub.

Reference Links:

PowerTap - http://www.cycleops.com/en/products/power-meters.html

GSC 10 - https://buy.garmin.com/shop/shop.do?pID=1266

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