Note: When you click the links below to download the firmware, it indicates that you have already read and agreed to the Open source licenses.

How to upgrade the firmware of UTWS5: Click here

(Video instruction: Click here)

FiiO Control app: Click here

UTWS5 V1.5 firmware download link: Click here

Added PEQ, codec display, and codec selection functions for the UTWS5

UTWS5 V1.42

Improved the calling quality.

Updated at 2022-03-29

UTWS5 V1.4 firmware download link: Click here

The following changes and improvements have been made in V1.4:

1. Added Ambient Sound Mode

After enabling the Ambient Sound Mode, we can easily catch up with small talks with our friends, hear the sound of vehicles on the road as well as the arrival reminder in the subway without taking off headphones.

Triple-click the button on the right earhook to enable the Ambient Sound Mode. Also, we can enable it on the FiiO Control APP: UTWS5->Audio->Ambient Sound, and adjust the gain here.

2. Added Game Mode

Turning on the Game Mode can significantly improve the low latency in the Bluetooth transmission process.

Tested by FiiO Labs, the aptX Adaptive can improve the latency by about 27% while the aptX can improve by about 41%.

**When connecting the UTWS5 to the Mi 10 in aptX Adaptive codec, the measured latency goes up to 165ms with the Game Mode off, while the latency goes down to 121ms with the Game Mode on.

**When connecting the UTWS5 to the Huawei P20 in aptX codec, the measured latency goes up to 255ms with the Game Mode off, while the latency goes down to 150ms with the Game Mode on.

3. Added LHDC Bluetooth codec (beta version)

LHDC is a high-definition Bluetooth audio codec technology with similar performance to LDAC, both of which support up to 96k/24bit audio transmission.

When LHDC was HWA at first, FiiO took the lead in applying this technology to the BTR3 stereo Bluetooth amp. After years of technical iterations, it is now becoming more and more mature. In addition, some Chinese mainstream mobile phone manufacturers (such as OPPO, Xiaomi, vivo) have gradually included the HD Bluetooth transmission of LHDC, making this technology more and more popular.

In order to meet the needs of more audiophiles for high-definition sound quality of TWS Bluetooth transmission, we decided to introduce LHDC again and try it out on the UTWS5 first after careful consideration.

4. Miscellaneous improvements on performance.