Quarq: NEXT-GEN POWER METER FOR SRAM’S VENERABLE GROUPSETBuilt for SRAM’s popular RED groupset, & compatible with all of SRAM’s road groupsets, the SRAM RED DZero Power Meter embodies 10 years of Quarq’s technology advances & adds new features such as dual Bluetooth low energy & ANT+ wireless data transfer, the new Qalvin BLE app & compatibility with BB386EVO bottom brackets.