1. How to use the KA3 as a USB DAC for mobile phones?

【Android-based phone】
Use the TypeC-TypeC data cable to connect the KA3 to a mobile phone. So you can directly enjoy high-quality music by playing songs.

Notes:
1. A compatibility issue may occur to certain Android mobile phones or music players due to system and hardware differences.
2. Some mobile phones are required to turn on the OTG function, so as to use the KA3 normally.For detailed settings please consult the support of mobile phones.
3. Some mobile phones may show the 'non-certified Type-C digital headphone'notification. You can ignore the message and use it normally.

【iPhone/iPad】
Please buy an extra Lightning-TypeC OTG adapter to connect the KA3 to an iPhone/iPad/iPod. So you can directly enjoy high-quality music by playing songs.

Notes: 
1.Only supports iOS10.0.2 and above. Apple devices below this version cannot be supported because of the iOS itself.
2.Since there are limitations for iPhone to power the external USB device, the KA3 with high output power may have stuttering or no sound problems at extreme volume. 

How to download lossless music to FiiO Music app ( iOS version)?
Please refer to the FAQ in Apple website: https://support.apple.com/en-us/HT201301