4 in 1 USB Camera Connection Kit: USB OTG Port / Charging Port / Micro-SD(TF) Port / SD Port (SD/TF Card Not Included) Supports simultaneous file reading and device charging. Enjoy high-speed pass-through charging while using; sharing will not stop due to lack of power. Note: SD card and TF card cannot be read at the same time. SD/Micro-SD/USB, only one card can be read at a time. The digital camera adapter supports memory cards up to 512GB and USB flash drives up to 256GB. The SD card adapter can copy photos and videos quickly with transfer speeds up to 60 MB/S - 90 MB/S, saving time. The Micro-SD card reader adds convenience to your work and daily life. The USB adapter is suitable for various occasions. The micro-SD card reader is widely compatible with USB devices such as keyboards, mice, USB sticks, USB flash drives, cameras, microphones, and other standard USB peripherals. Please note: Why does it heat up during use? Answer: The USB flash drive may generate heat during operation. When powered, the adapter reads data. The adapter shell is made of heat-conductive material with thermal silicone inside, allowing fast heat dissipation. You may feel warmth when touching it, which is normal and indicates effective heat management. The built-in certification chip is designed to withstand high temperatures and will not affect the USB drive or connected device. Color: White Material: Plastic Package Contents: 1 x 4 in 1 USB OTG Card Reader Note: Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual item. Measurement may vary by +/- 1-3 cm.