This board is an expansion option for the LANCOOL II from Lian Li, which allows it to be expanded by means of three hot-swap slots. For this purpose, the back plate is screwed to the rear of the 3.5-inch hard disk cage, for which corresponding holes are already available. 3x SATA data (data transmission) 2x SATA current (power supply) PCB Plate: 85mm (L) x 116mm (D) x 1.6mm (H) SATA Power Cable Length: 80mm Light Guide Plate: 175mm (L) x 20mm (D) x 1mm (H) SATA Data Cable Length: 400mm