Power Meter — Dual-Sided Crank Arm

Measure your true power output with left-right balance using the Dual-Sided Crank Arm Power Meter. Strain gauge sensors in both crank arms transmit via ANT+ and Bluetooth Smart simultaneously. Accuracy: +/-1%. Battery life: 500 hours (CR2032 x2). Compatible with Shimano 105, Ultegra, and Dura-Ace cranks.