StarTech.com 2 Port Flush Mount ExpressCard 54mm SuperSpeed USB 3.0 Card Adapter with UASP

Dual Port Laptop ExpressCard USB 3 Controller (ECUSB3S254F) - USB adapter - ExpressCard - USB 3.0 x 2 - for P/N: S2510BU33PW, S251BMU3FP, S251BU31315, S3540BU33E, SM2NGFFMBU33, UNI251BMU33