These cards are genuine but do not come in retail packaging.  They will be sent in generic packaging because they came from an Internet of Things (IoT) company that was liquidated.  They were intended for IoT devices that need memory cards that can handle frequent write-rewrite cycles without failing.  Normal (not high-endurance) cards will fail quickly if used in those kinds of devices.  These high-endurance cards are excellent for devices like dashcams that constantly write and rewrite data but do not need massive capacities.