The StarTech 2 Drive 2.5in Trayless Hot Swap SATA Mobile Rack Backplane is a drive bay adapter designed for computers and notebooks that allows for easy installation of up to two 2.5-inch SATA drives. Made by StarTech in China, this mobile rack backplane provides a convenient solution for expanding storage capacity or accessing multiple drives on the go. With a trayless design, this product offers quick and efficient swapability for both SATA hard drives and SSDs, making it a versatile accessory for computer users.