Product details:

Quarq DZero 11R-130 Non-Hidden Bolt Power Meter Carbon Experience a decade of innovation plus added features with the new Quarq DZero Carbon Power Meter. Quarq next generation in power meters, DZero combines 10 years of technology advances with new features such as dual Bluetooth low energy and ANT+ wireless data transfer, the new Qalvin BLE app and, for the carbon version, compatibility with BB386EVO bottom brackets. Works with traditional 5-bolt chainrings from most manufacturers.