Material: ABS+Aluminum alloy Color: gold, silver Features: reverse charging, data transmission Applicable models: Macbook 12 inches Extension port 3*USB3.0 (backward compatible with USB2.0/1.1) 1*USB Type-C (data can be transferred, Macbook can be charged) USB3.0 5Gbps super high-speed transmission. 3 USB3.0 and 1 USB Type-C expansion to meet the needs of peripheral transmission and interface. The 14.5V 3A power supply can supply power to the computer through the extended USB Type-C. The USB Type-C interface perfectly supports both front and back plugging. Note: 1. Please Allow 1-3cm Differs Due To Manual Measurement. 2. Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Please refer to the actual product.Thanks For Your Understanding. Multi-system compatible, plug and play without driver.