4iiii Precision Shimano 105 FC-5800 Left Side Crank Arm Power Meter 165 mm

Shimano 105 4iiii crank arm power meter with a rechargeable battery.
The most accurate way to measure your effort level when cycling.

FC-5800
Length is 165 mm.

Used for 4-5 rides only, in great condition. Has some small scratches (see pics).