External Blu-ray drive with USB connection and 4 ports. I used it once and it worked without any problems! It supports Blu-ray, SD cards, MicroSD cards, and Type-C USB. - Type: External Blu-ray drive - Connection method: USB connection - Number of ports: 4 ports - Power supply: DC 5V - Product name: Multi-function external optical drive Thank you for viewing. Features: USB hub function Hardware interface: SD card, USB 3.0, USB-C Brand: Earth Dreams Optical storage write speed: 4x Optical storage read speed: 8x Hardware platform: Laptop [Earth Dreams Quality - Peace of mind of a Japanese brand] Planned and quality-controlled by Earth Dreams, a Japanese company. A reliable DVD-RW drive optimized for the Japanese market. [Expands to 7 ports with USB hub function] Integrates 4 x USB 3.0 + Type-C + SD/TF card reader. Instantly solves the lack of ports on your laptop, allowing simultaneous connection of a mouse, SSD, USB memory, and cards. [USB 3.0 high-speed transfer - up to 5Gbps] Theoretical speed about 10 times faster than USB 2.0. Compatible with both old and new PCs with a USB-A & USB-C dual cable, allowing for smooth transfer of large amounts of data. [Blu-ray 4-layer BDXL support] Supports BDXL 128 GB reading, DVD±R/RW 8X, and CD-R/RW 24X writing. Consolidates everything from movie viewing to system backups. [Ultra-thin design & Plug & Play] Features a brushed finish body approximately 2.3 cm thick and non-slip rubber. No drivers needed for Windows/macOS/Linux, and stable writing with auxiliary Type-C power supply.