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