This Verve InfoCrank M30 power meter includes strain gauges within both crank arms so you can get left and right power measurements. Although I included the original bearings, you will need to get a Praxis BB (30mm drive side / 28mm non-drive side) that is compatible with your bike frame. See PRAXIS M30 BB OPTIONS - Praxis Works. The chainrings show signs of normal wear, but they can be easily replaced too.
Chain Ring: Praxis Works Mid-Compact 52/36t. Bolt Center Diameter (BCD): 110.