Quarq DZero Powermeter Spider for Specialized, 130mm BCD, Spider Only

DZero for Specialized Spider
Compatible with these power meter cranks: Quarq Elsa RS, Quarq Riken Al, Quarq Riken R (produced July 2015 and later), SRAM XX1, 2016 and later SRAM Red power meter cranks (Red eTap graphics)
Compatible with these non power meter cranks: Quarq Prime and SRAM Red BB386EVO
Not compatible with Quarq Elsa R cranks
Measures power for both legs with +/_ 1.5% accuracy
Dual Bluetooth lowenergy and ANT+ wireless data transfer
AxCad system provides no-magnet cadence data
Free firmware updates with the QALVIN APP
Uses a CR2032 battery that can be replaced without tools