4iiii - DUAL SIDE PRECISION PRO ULTEGRA R8000 POWER METER 

Ridden by the pros, the PRECISION PRO dual-side power meters deliver all the benefits of 4iiii's left-side model (exceptional accuracy, lightweight design, ANT+ and Bluetooth compatibility, 3D power meter technology), plus a specific breakdown of left and right wattage. Perfect for those who need specific power output from each crank side, or anyone who simply wants the best power meter on the market.

• 3D power meter technology (patent pending) measures tri-axial strain on the 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
• Weight: 25 grams (power meter only)
• Data accuracy: +/- 1% error margin
• Battery life: 100+ hours on 2032 coin cell battery
• Battery status indicator: Alert at 15% battery power
• For display compatibility click here
• For service and software documents click here