1. KA5 Quick start guide, download, etc.

Quick start guide download link: Click here

FiiO USB DAC driver download: Click here

FiiO Control Android version download link: Click here

(The KA5 could not be controlled via the iOS version FiiO Control APP. You could set the setting menu via the KA5 itself or in the Android version FiiO Control APP, and the settings will be saved to use it in other devices still.)