4. How to activate the menu of the BTR15? Introduction of the menu

Note: Track switching and play/pause function are not supported by BTR15 in USB decoding mode.

[Operation explained]

Power on: Hold the Power button for about 3s while the device is off.

Power off: Hold the Power button for about 5s while the device is on;

Reset: Short press the Power button for about 10s at any state.

Turn off/on the display: When the device powers on and is not on the menu page, short press the Power button.

Activate menu: When the device powers on and not on the menu page, hold the Power button for about 2s.

Exit menu: On the menu page, hold the Power button for about 2s.

Return to the previous menu step by step: On the menu page, short press the Power button.

Switch submenus: Short press the Volume+/- button on the menu page.

Confirm menu: Short press the Multifunction button on the menu page.

Activate menu: While the device powers on and not on the menu page, hold the power button for about 2 seconds.

Exit menu: Hold the power button for about 2 seconds on the menu page.

Return to the previous menu step by step: On the menu page, short press the power button.

Confirm menu: Short press Multifunction button on the menu page.

Switch submenus: Short press button volume +/- on the menu page.

Operation instructions after a successful pairing with a mobile phone through Bluetooth (not on the menu page):

Activate Siri/voice assistant: Double press the Multifunction button.

Play/Pause/Answer/Hang up/Cancel a phone call: short press the Multifunction button.

Reject a phone call: Hold the Multifunction button for about 2s when there is an incoming phone call.

Volume up/down: Short press the Volume+/- button.

Switch tracks: Hold the Volume+/- button for about 2s.

Clear pairing: Hold the Volume+ and Volume- buttons at the same time for about 5s when the device is on.

[Introduction to main menus]

CHG PR: Charging protection

ON: When the battery is charged to 80%, the USB will stop charging the battery, but will still provide power for the system.

OFF (by default): The USB will charge the battery and provide power for the system.

GAIN

The BTR15 supports H/L three levels of gains

FILTER

Sharp Roll-Off Filter and Hybrid fast roll-off filter

Filters are the sound effects born with the chip, which only has slight adjustments for the sound.

EQ

7 presets+3 user EQ are supported: JAZZ POP ROCK DANCE USER R&B CLASSICAL HIP-HOP

You could set the custom User EQ via the FiiO Control APP

CARMODE

Enable or disable the car mode on the menu. When the car mode is enabled and the BTR15 is off, it will automatically turn on after inserting a USB, and will automatically turn off after unplugging the USB if the BTR15 is on. The Car mode can be enabled or disabled based on different use scenarios.

U-AUDIO

Switch between UAC 1.0 and UAC 2.0 mode.

UAC1.0: Driver Free mode under USB 1.0

UAC2.0: High bit rate transfer mode under USB2.0

DIMMER

Adjust screen brightness level: 1~4

LANG

Switch between Chinese and English

(The language selection page will show when turning on the first time or after factory reset. )

VER

Check the firmware version of BTR15