The 24-pin bridge plug can operate by itself and start any ATX/EPS power supply. The test starter allows power on the PSU without plugging into the motherboard. Made of high-quality materials, strong, durable and long service life. Great for BTC Miners (Antminer, Block Erupter, Avalon, etc.) Colour: Black.Quantity: 2PCS 24-pin ATX PSU bridging too