The PCIe x4 to SFF-8639 U.2 Male with SATA Power Adapter is a powerful and versatile device that connects high-speed U.2 (SFF-8639) devices to your computer's PCIe slot. This adapter is designed to be fully compliant with NVME Express 1.2A, PCI Express Base Specification Rev 3.0, and SSD Form Factor Version 1a, making it the perfect choice for professionals and enthusiasts alike. The adapter features a built-in SFF-8639 connector with a pin-out defined by PCIe, as well as a built-in SATA 15 Pin power connector. This allows you to easily connect your U.2 device to your computer and power it up with ease. The adapter also features a PWM synchronous buck converter Power IC, ensuring your device receives a stable and reliable power supply. The adapter also supports 3.3V SMB_CLK, 3.3V SMB_DATA, and 3.3V CLKREQ# for U.2 (SFF-8639) DEVSLP. This allows you to easily connect your U.2 device to your computer and power it up with ease. The adapter also features a D1 Green LED that lights up when the adapter is ready to use. The adapter can be powered in 3 ways: using the U.2 to cable with a power cord, PCIe power, or 15-pin SATA power. This makes it easy to power up your U.2 device and start using it right away. The adapter is also compliant with SFF-8639 Specification Rev 2.0, ensuring that you have the latest and most advanced technology at your fingertips. In summary, the PCIe x4 to SFF-8639 U.2 Male with SATA Power Adapter is a powerful and versatile device that allows you to connect high-speed U.2 (SFF-8639) devices to your computer's PCIe slot. With its built-in SFF-8639 connector, pin-out defined by PCIe, and built-in SATA 15 Pin power connector, you can easily connect your U.2 device and power it up with ease. The adapter also features a PWM synchronous buck converter Power IC, ensuring your device receives a stable and reliable power supply. So, whether you're a professional or an enthusiast, this adapter is the perfect choice for you.