1 x 5.25' bay form factor size backplane for 4 x NVMe HDD/SSD Equipped with 4 x Oculink (SFF-8611) connectors for quick and easy drive management Supports up to 4 x 2.5' NVMe U.2 SSD/HDD Metal frame with stainless steel HDD carriers for durable and secure storage Worry-free sliding-in carrier design - simply slide in the tray and start using 2 x 15-pin power connector + 4 x Oculink (SFF-8611) connectors for efficient power delivery Supports U.2 GEN3 32Gbps and GEN4 64Gbps performance (performance may vary based on the environment) Comes with 4 individual carriers for easy swapping in and out Includes a security metal keylock with 2 keys for added protection Features 2 x 4020 cooling fans for optimal airflow and heat dissipation LED Indication: Power On (solid green) and Accessing (orange blinking)