So How does it work?

Below are the technical specifications of the POWERBEAT™ G3 Dual:

Accuracy: 1.5%
Power metrics: Independent Power, Power Balance, Torque Efficiency, Pedal Smoothness, & Cadence.
Weight: 35g per side
Communication: ANT+™, BLUETOOTH® SMART Dual and BLUETOOTH® SMART Single
Rechargeable battery: LiPo 3.7V; 60 hours of usage; 2 hours to recharge
Waterproof: IP67 certified
Compatible cranks:
  • Cannondale Si Hollowgram
  • Cannondale SiSL
  • Cannondale SiSL2
  • Campagnolo Potenza
  • Shimano Dura Ace 9150
  • Shimano Dura Ace 9100
  • Shimano Ultegra R8070
  • Shimano Ultegra R8050
  • Shimano Ultegra R8000
  • Shimano Dura Ace 9070
  • Shimano Dura Ace 9000
  • Shimano Ultegra 6870
  • Shimano Ultegra 6800
  • Shimano 105 5850
  • Shimano 105 5800
  • Shimano Dura Ace 7970
  • Shimano Dura Ace 7950
  • Shimano Dura Ace 7900
Mobile apps: iOS 10 and Android 4.4.2 and above