PM3U (MiniCard to USB2.0 Adapter) Allows your laptop PC to save an external USB slot. Insert your small USB device in the Laptop PC. Transparent to the operating system and does not require any software drivers. Both Full and Half size of MiniCard Slots are supported. USB2.0 Bus connection regardless of USB3.0 connector. System Requirements: MiniCard slot with USB2.0 interface (Full or Half size)