1. Material: aluminum alloy + ABS housing. 2. Sizes: 126 * 38.2 * 14.8mm, cable length: 110mm, weight: 60g. 3. Interface: output Type-C male. Expansion: USB3.0 female * 3 + SD + TF. Transmission rate: 5Gbps (theoretical speed). SD / TF supports SD / SDHC / SDXC, SD3.0 UHS-1. Support dual card simultaneous use. 4. USB port output: USB3.0: conventional support up to 0.9A / USB2.0: 0.5A. Solve the problem of laptop interfaces scarce. Compatible for most USB external equipment, support hot plug. Support phone, tablet OTG. System compatible: Windows 7 / 8 / 10, Google Chrome OS, Mac OS X Yosemite, Mac OS X EI Capitan, Mac OS Sierra or abov