The LeMobile Composite ADB Interface driver is associated with LeEco (LeMobile) smartphones and allows your Windows computer to interface with the phone for development purposes or for transferring files. ADB stands for Android Debug Bridge, which is a command-line tool used by developers to communicate with Android devices. The "Composite" part of the name refers to the fact that the device can communicate via multiple protocols (like ADB, MTP for file transfer, and others) over a single connection.

When you connect a LeEco smartphone to your computer via USB, the LeMobile Composite ADB Interface driver is necessary for your system to recognize and interact with the device correctly, whether it's for debugging, transferring data, or performing software updates.