OTG (On-The-Go) adapters for iPhone allow USB connections for iOS devices, making it easier to connect various USB peripherals to your iPhone. Here are some features and points worth noting:

• Compatibility: Make sure the OTG adapter is specifically designed for iPhone units. Compatibility with iPhone may vary, so it’s important to check if the adapter supports your particular model and iOS version.
• USB Connection: OTG adapters typically have a Lightning connector that plugs into the iPhone and a USB port for connecting USB devices. This allows you to connect USB flash drives, keyboards, cameras, and other peripherals.
• File Transfer: With an OTG adapter, you can transfer files between the iPhone and USB storage devices. This can be useful for storing photos, transferring documents, or accessing files that are stored on USB drives.
• Support for External Devices: Depending on the specific model of the adapter, it may support various USB peripherals such as keyboards, mice, game consoles, etc. This expands the functionality of your iPhone, allowing you to use external devices.
• OTG Application: Some adapters may require the use of a specific app from the App Store to enable OTG functionality on the iPhone. Check if the adapter comes with instructions regarding the app you should use for optimal performance.
• Compact Design: Many OTG adapters are designed to be compact and portable, making it easy to carry them in your pocket or bag for on-the-go use.

For details about the specific model "YHL-888", it is recommended to check the product documentation or user reviews.