Adapter Model B is perfect for motherboards with only a USB3.0 19-pin socket and no USB2.0 9-pin socket.Type A adapter is suitable for motherboards with only a USB2.0 9-pin socket and no USB3.0 19-pin socket.Type A motherboard requires a USB2.0 9-pin to USB3.0 19P plug connector. new and high-quality adapter from a reputable brand.Type B motherboard requires a USB3.0 19-pin to USB2.0 9P plug connector. Introducing our brand new high-quality USB adapter, designed to meet your connectivity needs This adapter is specifically designed for Type A motherboards that only have a USB2.0 9-pin socket and do not have a USB3.0 19-pin socket. With our adapter, you can easily upgrade your motherboard's capabilities by converting the USB2.0 9-pin socket into a USB3.0 19-pin plug connector.Our adapter is perfect for those who want to take advantage of the faster data transfer speeds and improved performance offered by USB3.0 technology. Simply plug the adapter into your motherboard's USB2.0 9-pin socket, and you'll be able to connect USB3.0 devices seamlessly.We understand that not all motherboards are created equal, which is why we also offer a Model B adapter. This adapter is suitable for motherboards that only have a USB3.0 19-pin socket and do not have a USB2.0 9-pin socket. With our Model B adapter, you can easily connect USB2.0 devices to your USB3.0 motherboard.Rest assured, our adapters are made with the highest quality materials to ensure durability and reliability. Item Name: Adapter Material: PCB Model: PH23Style: A-USB2.0 19pin Plug, B-USB3.0 19pin PlugFeatures: High-Speed, Lightweight, Portable Size Details: A, L: 2.3cm/0.91", W: 2.3cm/0.91", H: 0.7cm/0.28" (Approx.)B, L: 2.7cm/1.06", W: 2.2cm/0.87", H: 0.6cm/0.24" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Adapter