1、PCB 240 copper hole for better heat dissipation - The heat generated by the disk can be accelerated through the copper hole. 2、Thickened PCB - The gold-plated version is more durable and stable than the painted version, especially for high-speed signal transmission with better continuity and stability. 3、Large-capacity tantalum capacitor + constant-voltage filter - Make the current more stable and constant, filter the clutter, give the disk a pure and stable power supply. 4、Professional R&D - High-elastic connectors provide stable contact, vibration resistance and durability. 5、PCIE+SATA dual interface dual protocol: B Key interface: m.2 NGFF for SATA specification (requires SATA data cable to connect to the motherboard) + M Key interface: m.2 NGFF (also called NVMe, directly available) for PCI-E specification. Features: PCB 240 copper hole for better heat dissipation - The heat generated by the disk can be accelerated through the copper hole. Thickened PCB - The gold-plated version is more durable and stable than the painted version, especially for high-speed signal transmission with better continuity and stability. Large-capacity tantalum capacitor + constant-voltage filter - Make the current more stable and constant, filter the clutter, give the disk a pure and stable power supply. Professional R&D - High-elastic connectors provide stable contact, vibration resistance and durability. NVME+AHCI dual interface - When connecting the B. Key (SATA protocol) m.2 NGFF, you need to connect the motherboard SATA interface with SATA data cable to work. (Note: SATA data cable is NOT included) PCIE+SATA dual interface dual protocol: B Key interface: m.2 NGFF for SATA specification (requires SATA data cable to connect to the motherboard) + M Key interface: m.2 NGFF (also called NVMe, directly available) for PCI-E specification. Supports hard disks of 5 different length: 30mm, 42mm, 60mm, 80mm, 110mm. Specification: Type: M.2 NVMe SSD NGFF to PCIE X4 Converter Card Weight: Approx. 81g Size: Approx. 14.2 * 6.8 * 0.7cm Baffle size: Approx. 12 * 2.1cm Package list: 1 * Converter Card 1 * Baffle 1 * Screw Kit Note: 1. Please note that the SATA data cable is NOT included. 2. ''Gold-plate'' is a industry terms, not really plated by gold. 3. Please allow slight error due to manual measurement. Thanks for your kind understanding.