* The Quarq DZero power meter platform features a new measurement circuit, a revised strain gauge design, improved accuracy throughout the pedal stroke and software advances built into the Qalvin App, * Bluetooth low energy and ANT+ lets you choose how to capture the data.* ANT+ continues to be used in most cycling computers, and BLE works with most smartphones* BLE does not need a dongle or USB stick. Qalvin BLE needs no additional hardware.* 10K temperature compensation, easy-to-replace batteries, OmniCal, AxCad, an IPX7 waterproof rating and 2-year-warranty.* Exogram carbon crank arms with a hidden bolt spider