The BCD (bolt circle diameter) determines the chainrings: BCD 110 = 5-bolt (50/34) and (52/36). BCD 130 = 5-bolt (53/39 or bigger). BCD 110-4S = for Shimano 4-bolt chainrings..
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PRECISION:+/- 2%; Upgradeable to +/- 1%
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DATA TRANSMISSION:ANT+ / BLE
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TEMPERATURE COMPENSATION:TC
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POWER SUPPLY:battery CR 2450
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BATTERY LIFE IN HOURS:300
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POWER METER METRICS:power, cadence; Upgrade with extra costs: L-R balance, pedal smoothness
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WARRANTY:2 years, Upgradeable to 5 years
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WATER RESISTANT: yes
