Standard 5.25 -inch optical drive bay mounting, fits most desktop computer chassis; 7 high-speed USB 3.0 Type-A ports support 5Gbps fast data transmission; Built-in Molex 4Pin power supply port supplies sufficient power for multiple HDDs; 2.6 ft long 20pin internal cable easily connects motherboard USB 3.0 header; Front accessible design, plug-and-play without extra drivers for stable multi-device use