Charging function: our new USB OTG adapter for iOS supports USB devices which need high power, like hubs, USB flash drives, camera, guitar, microphone, MIDI keyboard, digital piano, mouse, etc. You can connect USB devices of currents above 100mah (within 500mAh) Plug and Play: Upgraded USB Camera Adapter is easier to transfer photos or videos from your camera to your iPhone or iPad; Easy to use, plug and play, NO APP NEEDED. Your iOS devices will automatically open the photos app while connecting this adapter, and you can choose photos or videos you want to import.Support Formats For iOS 9.2-12.4 users, this usb camera adapter supports JPEG photo format and H.264 -MPEG-4 video format taken from digital camera. You can only import photos/videos from digital camera to your iPhone and iPad.For i0S 13 or later users, is two-way transmission, you can import - export image, video, MP3 files, MP4 files,Excel, Word, PPT, PDF to "Files" or "Photo" App. Connecting Musical Devices:Our OTG adapter supports iOS devices connecting to MIDI keyboard, electric piano, drum, audio interface, mixer, microphone and so on. iOS OTG USB Adapter is the constant choice of electronic musical instrument players.