The warranty period on FiiO KA13 is for 1 year. To read more information click here.

Connect the KA13 to the Android mobile phone via the USB c to c adapter that comes with the KA13.You could search “FiiO Control” in any application market to download it. Or directly download the APK file: Click here.After adjusting the setting for KA13 in FiiO Control APP, the buttons in KA13 will not work again before FiiO Control APP returns to the homepage. (You could click the return icon in the top left corner for returning to homepage)Note:1.The KA13 could not be controlled via the iOS version FiiO Control APP. But after adjusting the setting in KA13 or in Android FiiO Control, the settings will be saved.2.Please update the FiiO Control APP to latest version first.

[Android-based phone/PAD]Use the TypeC-TypeC data cable to connect the KA13 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 KA13 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】Use the Lightning-TypeC OTG adapter to connect the KA13 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 KA13 with high output power may have stuttering or no sound problems at extreme volume.About the Exclusive USB Audio Access ModeDue to system and hardware differences of certain Android mobile phones, there may be some permission conflicts and compatibility issues when they are working in the Exclusive USB Audio Access Mode. Here are some situations we have noticed.1.For some mobile phones with no physical volume buttons (such as the HUAWEI Mate30 Pro), in the FiiO Music app USB Audio Access Mode, you can adjust the volume by sliding on the current playback page to bring up the volume bar.2.For some mobile phones, third-party apps are forbidden in the background by default in their power management policies. This will cause a stop on the playback after a few seconds when the music app is working in the Exclusive USB Audio Access Mode. If it happens, please set the app to stay working while asleep in the battery management setting of the mobile phone.3.When the music app is working under the Exclusive USB Audio Access Mode, the sound may be stuttered or paused when operating other apps. We are working on this issue. It is suggested to focus on listening to music when using the Exclusive USB Audio Access Mode, or disable the Exclusive USB Audio Access Mode when listening to music.

[Windows PC]1.It runs drive-free in Windows 10 and above systems.2.Install the FiiO USB DAC driver. It supports ASIO output for further DSD256. Please click the link here to download the driver: Click here.3.On the menu of settings - audio output device of the playback software, select 'FiiO KA13' and then connect the KA13 to the headphones to listen to music.DSD track playback settings: Click here.[MAC computer]MAC systems do not need a driver. If connecting to a Type-C port of the computer, use a Type-C to Type-C cable for direct connection. If connecting to a USB-A port, use a USB-A to Type-C cable for connection. Please select 'FiiO KA13' as the audio output device on the computer.[Linux PC]Linux system also runs drive-free. Theoretically, connecting the KA13 directly to a Linux computer would work. But since there are too many versions, we cannot guarantee all systems are compatible. So, if the connection fails, it is suggested to change the data cable or USB port to troubleshoot the problem. Otherwise, the failed recognition means nonsupport.Music stutters on some Windows computers due to the driver(1) It is due to the different power management policies of some computers.Please go to the settings menu of Control panel->Hardware and Sound->Power options to disable the 'USB selective suspend setting' and then restart the computer.(2) If the problem still exists, please go to the Power options->PCI Express and turn off Link State Power management.(3) If it still can't be solved, please choose the driver-less mode. Uninstall the DAC driver and ASIO, and then choose the KA13 as the output device.

KA13 Firmware V0.21 download link: click here Note: Before upgrading the firmware for KA13, please unplug other decoders from the USB interface on the computer! 1. Install the Windows driver: click here. 2. Connect the earphone to KA13, and connect KA13 to the Windows computer. 3. Double-click "FIIO_FIIO KA13_V0.15" to open the burning tool and modify the corresponding Vendor ID and Product ID. The Vendor ID is 2972 and the Product ID is 0062. 4. Click "Write EEPROM" to burn the firmware. When the following pop-up window appears, re-plug and unplug the USB interface of KA13 (power on again), and then click "确定". 5. When "Write to EEPROM OK!" appears, the firmware is burned successfully.

When the D.MODE is toggled to ON, the desktop mode is on. The output power and gain of KA13 could be higher. It is recommended to drive high-impedance headphones or the device which is hard to be driven.When the D.MODE is toggled to OFF, the desktop mode is off. The KA13 is used for daily music enjoying and driving the low-impedance headphones.