Art Of Utility Ab D425 Bluetooth Earbud User Manual

: June 5, 2024
: Art Of Utility Ab

Table of Contents

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TRUE MUTE ‐ User Manual

Thank you for choosing the Defunc TRUE MUTE model. Read this manual to optimize your experience.

Technical specifications

Bluetooth® version: 5.0
Transmission frequency: 2.4 GHz
Earbud battery: 50 mAh
Charging case: 500 mAh
Earbud recharges in charging case: 4-5 times
Active playtime: ≈ 7-8h
Standby time: ≈80H
Charging time: ≈ 1.5hrs
Speaker dimension: Dia 13mm 32Ω±15%
Speaker sensitivity: 101±3dB At 1KHz 126mV C
the charging means USB to Type C
Power supply bin voltage: 5V
Transmission frequency: 20Hz-20KHz
Codex: AAC, SBC
Rated Power for Earbuds: 22.2mW
Rated power for Charging case: 0.38W
Frequency band in which the product operates==2402~2480MHz Maximum radio- frequency power transmitted within the above frequency band 4dBm（Refer to the CERed report later, to be updated once the report is available ）
Net weight: ≈ approx 49g

What’s included

Defunct True Mute earbuds
USB-C charging cable
Charging case
User manual x1
Silicon tips, A3 series: 2pcs L size, 2pcs M size, 2 pcs S size; Q31 series: 2pcs L size, 2pcs M size, 2 pcs S size.

With Hall switch

When opening the lid charging case, the earbuds will automatically power on and pair with each other.

Overview and controls
Power on Open the lid of the charging case and take the earbuds out for auto-power on. or touch the L & R earbuds for 3 seconds to power on the earbuds.
Power off: Put the earbuds back in the charging case or touch either the right or left earbuds for 5 seconds.
Auto-power off: The earbud will turn off after 5 minutes in a paired mode without a connected device.
Answer/end call: Double-click either the left or right earbud to pick up the phone calls or end the phone calls.
Reject call: Press either the left or right earbuds for 2 seconds to reject the call.
Play/pause: While listening to music, double-click the touch area of any earbud once for play&pause the music.
Next track: While listening to music, triple-click the right earbud to enter the next track.
Previous track: While listening to music, triple-click the left earbud to enter the last track.
Voice assistant: Press the left earbud for 3 seconds to activate the Voice Assistant, and press the left earbud for 3 seconds again to close it （ Most the android phones automatically close the Voice Assistant and do not accept the earbud shutdown instructions ）.

Pairing
Charge the earbuds fully before pairing them to your device for the first time using.

Open the lid of the charging case, the earbuds will automatically power on and paired with each other.
When blue/red lights in the right or left earbud flash alternatively, means earbuds are ready to be paired to your device.
Active Bluetooth function on your device and select Defunc TRUE MUTE in the Bluetooth list.

ANC/Monitor
The earbuds boot will not automatically activate the ANC or Monitor function and need to operate through the following steps.

Press the right earbud for 3 seconds to the ANC function.
Press the right earbud for 3 seconds again to close it and enter into the Monitor function.
Press the right earbud for 3 seconds again to close the Monitor function.

Charging
Charge earbuds: Put the earbuds back into the charging case and close the lid.
Charging: Red light of the earbuds is on.

Charge case
Connect it to the power supply with a USB cable.
Charging: Blue light flashing
Charging status: Each light equals 25% charged, once accumulated up to 25% then the flashing light begins toon, and the next light starts to flash.
Fully charged: All 4 lights are on, and then all go out.
Charging Case and earbuds can be charged simultaneously.
For support, visit www.defunc.com/troubleshooting

FCC Warning Statement

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
‐‐   Reorient or relocate the receiving antenna.
‐‐   Increase the separation between the equipment and receiver.
‐‐Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
‐‐   Consult the dealer or an experienced radio/TV technician for help.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. The device has been evaluated to meet general RF exposure requirements.