Charging function: Our new USB OTG adapter for iOS supports USB devices that require higher power, such as hubs, USB flash drives, cameras, guitars, microphones, MIDI keyboards, digital pianos, and mice. You can connect USB devices with currents above 100mAh (within 500mAh). Plug and play: The upgraded USB camera adapter makes it easier to transfer photos or videos from your camera to your iOS device. Simple to use, no app required. Your iOS device will automatically open the Photos app when the adapter is connected, allowing you to select photos or videos 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 from digital cameras. Import is limited to transferring photos and videos from digital cameras to iOS devices. For iOS 13 or later, two-way transmission is supported, allowing import and export of images, videos, MP3 files, MP4 files, Excel, Word, PPT, and PDF files to the "Files" or "Photos" app. Connecting musical devices: This OTG adapter supports connection of iOS devices to MIDI keyboards, electric pianos, drums, o interfaces, mixers, microphones, and similar equipment. The iOS OTG USB adapter is a reliable choice for electronic musical instrument users.