The power2max NGeco Praxis Road Power Meter is compatible with Praxis direct mount cranksets. This includes the Zayante M30, Alba M30 and Zayante Carbon M30. Direct mount cranksets can be identified by 3 bolts located on the inside of the spider which are used to secure the spider to the crank arm.
You must ensure your Praixs crankset has these 3 bolts in order for the power2max power meter to fit.
Please also note the smallest ring that will fit on this power meter is a 34T. It is not compatible with with Praxis 48/32 chain rings.