Feature 1. Long pre 3 seconds to control the hard drive switch (without unplugging the USB cable) Feature 2. Pre twice to switch the color Pre three times to switch the brightne Pre five times to switch the hard drive protection Feature 3. It has a memory mode, it can remember the last state, the next time the power on is still your favorite color Product Description Three light modes: Multiple lights flashing: no hard drive, standby state, hard drive removed Green light on: read/write protection is off (in use) Blue light on: read/write protection on (in use) Easy to See Which Drive Inside - JEYI 2.5 hard drive enclosure made of high-quality transparent crystal PVC material. The clear d case design allows you to see the inside drive without opening it. Ultra-fast USB 3.1 & UASP Accelerated: Transfer 1GB file in 3 seconds. The SATA interface of this enclosure supports UASP accelerated transmiion protocol, 70% faster than traditional USB 3.0. The USB 3.1 interface supports up to 1Gbps transfer rate, also backward compatible with USB 2.0 and USB 1.1 ports. Easy Installation: Plug & Play, no driver needed for this SATA enclosure. Tool-free installation. Just push out the cover, plug in the drive, close the cover and go. Hot-swap supported. No request for extra power supply. Universal Compatibility: Supports Windows, Mac OS X and above systems. Fit with most 2.5" SATA III / II / I HDD (Hard Disk Drive) & SSD (Solid State Drive) up to 2TB. What You Get: 1 x USB 3.1 to SATA 2.5" Hard Drive Enclosure, 1 x USB-A to USB-C Cable