Product Details： 1. Small Portable - Can Be Taken It With A Wallet. 2. Plug And Play; Hot Swapping; Usb Power (no External Power Or Battery); Supper Speed Usb 3.0 And Backward Compatible With 2.0/1.1. 3. Easily Transfers Content To/from Your Usb Devices With A Card 4. Compatibility: 7/8/8.1/10+, Ios, For-macos Etc. 5. It Allows You To Easily Add A Usb 3.0 Multi-slot Card Reader/writer To Your Usb 3.0 Enabled System. Different Batches May Have Different Appearance, Which Does Not Affect Use. Colour:black Material:aluminum Alloy Package Contents: 1 X Usb 3.0 Memory Card Reader Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.