The JCD382 UltraDrive can be used with Macbook Pro 2016 / 2018 and MacBook Air 2018. Thunderbolt 3 allows you to keep a Thunderbolt 3 and add an additional USB 3.1 Gen 1 Type-C, 4K HDMI, USB 3.1 Gen1 Type A x 2, USB 3.0 micro SD and SD through your two Thunderbolt 3 ports. Thunderbolt 3 uses the USB Type-C connector to deliver faster speed (40 Gbps), more pixels (two 4k), higher power (up to 100W), and more protocols (Thunderbolt, USB, DisplayPort and PCIe).
Transform 2 Thunderbolt 3 Ports on MacBook Pro to 7 Ports, including Thunderbolt 3, USB-C, HDMI, 2 x USB 3.0, SD & Micro SD card slot
Supports Thunderbolt 3 Display of up to 5K @60 Hz or Dual 4K @60 Hz, 40Gbps data and max 100W Power Delivery