Features: and high quality. 1. Small size, simple design, convenient to carry. 2. USB 2.0 interface transmission speed is up to 480 Mbps. 3. Organize your photos, watch films, or access your data with this OTG adapter. 4. Supports USB keyboards, most mice, USB flash drives, and USB hard drives. 5. The 3 USB ports can be connected at the same time. 6. Combined with SD and TF card slots, making reading different types of memory cards very convenient. 7. External power source (connected via Micro USB connector) is required when this card reader is connected to an external hard drive. (Power adapter is not included.) 8. Compatible with Galaxy S4, S3, Galaxy Tab 4, Tab S, Note 3, and other devices with OTG function and Micro USB port. Note: This item does not support charging function. This card reader + hub has a DC facility. If your smartphone or tablet cannot power this hub when you connect a hard drive to it, please use the included USB cable and an external power adapter (not included) to power it. SD and TF cards cannot be read simultaneously; it can only read one card at a time. Specifications: Item Type: 3-Port USB 2.0 Hub Combo Shell Material: ABS Color: White Size: 85 x 22 x 20mm / 3.35 x 0.87 x 0.79in (Approx.) Cable length: 15cm / 5.91in (Approx.) USB Type: USB 2.0 USB Ports: 3 Ports Data Transfer Rate: Up to 480 Mbps Connector: USB 2.0 Micro-B male Card Reader: For SD/SDHC/SDXC/TF (Micro SD) card (Not included) Compatible OS: Windows XP/2000/Vista/WIN 7/8/10, Mac OS, Linux, Android, etc. Quantity: 1 PC (other accessories shown in the picture are not included) Note: 1. Conversion: 1cm = 10mm = 0.39inch 2. Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before purchasing. 3. Due to differences between monitors, the picture may not reflect the actual color of the item. 4. No retail packaging Package includes: 1 x USB 2.0 HUB SD/TF Card Reader (No retail packaging)