ADS-310A USB Adapter to 3 x USB 3.0 + 2 x Card Reader Slots Multi-Port Hub 1. This is a hub converting to 3 x USB 3.0 ports + 2 x card reader slots for SD & TF card 2. The 3 USB ports can connect USB flash drive, mouse, keyboard, mobile hard disk, etc 3. It provides fast transmission speed up to 5Gbps 4. The premium aluminum alloy shell is more wear-resistant, anti-oxidation, and has a longer service life 5. Built in 2 card reader slots, you can easily read the files on the memory card 6. USB connector supports connection to various laptops, tablets, smartphones and other devices 7. Compact size, easy to carry and use, improve working efficiency Specification: 1. Material: Aluminum alloy 2. Ports: 3 x USB 3.0, 2 x card reader slot (for SD&TF) 3. Size: 10.5 x 3 x 1.1cm 4. Cable length: 13cm 5. Operating temperature: 0 to 50 degree centigrade 6. Storage temperature: -20 to 60 degree centigrade 7. Compatible systems: Windows XP7810, for Mac OS 10.2.8 and above, for Linux