4 in 1 USB Camera Connection Kit: USB OTG Port / Charging Port / Micro-SD(TF) Port / SD Port (Not Included: SD/TF Card) Supports simultaneous file reading and device charging. Enjoy high-speed pass-through charging while using, and 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 read 1 card The digital camera adapter supports memory cards up to 512GB and USB flash drives up to 256GB. The iPhone SD card adapter can copy photos and videos to your iPhone/i-Pad in a short time, with a speed of up to 60 MB/S-90 MB/S, saving more time. The Micro-SD card reader brings more convenience to your work and life. The iPhone USB adapter is suitable for various occasions. iPhone micro-sd card reader is widely compatible with more USB devices, such as Kubs, mouse, keyboard, USB stick, USB flash drive, camera, microphone, digital camera piano, etc. Please note: Why does it heat up during use? Answer: The USB flash drive will heat up when it is working. When it is powered on, the adapter reads data. The adapter shell is made of heat-conducting material, and there is heat-conducting silicone inside, so the heat conduction is very fast. You will feel heat when you touch it with your fingers. This is also a phenomenon of good heat dissipation. The certification chip is designed to be resistant to high temperatures and will not affect the USB flash drive and the device. Colour:White Material:plastic Package Contents: 1 x 4 in 1 USB OTG Card Reader