Used to pace attacks up the Alpe D'Huez in the Tour de France and to hammer on the Queen K during the Ironman World Championships, the Precision Dura Ace 9100 powermeter delivers industry leading accuracy and reliability when you need it most. Through our patented 3D strain gauge technology, you have the assurance knowing that the data you depend on will help lead you to your own Yellow Jersey. Highly dependable cadence data, lightweight design, broad ant+ and Bluetooth smart head unit compatibility, and patent-pending 3D power meter technology. With this left-side ride, ready precision equipped crank, you'll be on your way to reaching new power peaks.

[Details] Specifications:

• 4iiii Precision Power Meter - Preinstalled in a Dura Ace 9100 left side crank arm
• 3D power meter technology (patent pending) measures tri-axial strain on your crank
• Accurate, consistent data
• Lightweight, compact design
• Battery status indicator via 4iiii app
• Compatible with ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products
• User-friendly app and configurable rider compensation scale factor
• Easy setup and maintenance
• Over-the-air upgrade capability for adding new features and updates
• Data Accuracy: +/- 1%
• Battery Life: 100+ riding hours on standard CR2032 coin cell battery
• Communication: ANT+ (BPWR Profile) and Bluetooth Smart (Cycling Power Service)
• Waterproof Rating: IPX7 (submergence to 1 meter)
• Weight: 9 Grams