4iiii Precision3+ Shimano R8100 Power meter left

4iiii Precision3+  new updated version of the best powermeter in the word

Now with integration with Apple, Find my Power 

•  lndustry leading battery with *800 hours of battery life
• Find my Powermeter  200 hours batteri lifte
• Produet status indication LED light - for wake up (green), zero offset (blue) and low battery (red)
• Patented 3D Strain Gauge technology to del iver+/- 1 % accuracy
• Ultra slim design to fit al most every frame
• Legendary 3 Year Warranty
• Waterproof, durable, designed and tested in the Canadian Rockies for the harshest conditions
• Lightest power meter on the market at only 9g
• Backwards compatible with current PRECISION Drive Side Powermeter
• Active temperature compensation
• Over the air feature and firmware upgradability
• Coin cell powered, CR2032
• Compatible with 3rd party training apps such as Zwift, TrainerRoad, SYSTM, and more