1. With output power indicator.2. With module switch to turn off the output.3. The output terminal can pass the maximum current.4. With the output protection fuse, four groups correspond to the four output paths. There is a terminal-12V,a +12V, 5V, 3.3V. Each output takes a 5A fuse. Overcurrent, the fuse can be replaced by yourself. Each power rail has a corresponding ground connection; All power rails are fed to the terminal. About 24pin port:24pin port powers the computer motherboard in the computer. Usually, this port is used together. Model:XH - M229Port Compatible: ATX (Partial BTX Type Compatible)Pin Number: 24 PIN Number of Output Kits: Four Sets of Different VoltageColor: BlueMaterial: PC+Metal Size: 12.8*4.8cm Package Contents:1 Power BoardOnly the above package content, other products are not included. Note: The light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.