XLFLEX: Smart Wearable That Tracks Your Arm Size

Here is a smart wearable device that helps track your arm size while you lift. It combines with your smartphone to record your measurements live. It also has a convenient display that shows your results.

More items like this: here

You can use 2 or more units to track everything. While the XLFLEX is designed for your biceps, it can track other body parts.

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