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Infinity NC Setup Guide

Connect by Bluetooth, or update in the App and join Auracast.

Start SetupFix a problem
Infinity NC earbuds and white charging caseInfinity NC · TW150Classic Bluetooth · Auracast
Choose your listening mode

What are you listening from?

Choose one path. You can change modes at any time.

MODE 1

Classic Bluetooth setup

No App is required for normal Bluetooth listening.

1

Enter pairing mode

First use: remove the protective film, return both earbuds to the case, then take them out. The left LED flashes red and blue.

Not flashing? Put both earbuds in the case and hold the case button for 3 seconds. Take them out again.
2

Select Infinity NC

Open Bluetooth settings and select Avantalk Infinity NC.

Connected: the LEDs turn blue for 1 second, then turn off.
3

Listen

Play audio. Both earbuds should sound.

Reconnect next time: take both earbuds out together. If needed, select Infinity NC again.
MODE 2

Auracast setup through the App

Complete the firmware update before joining Auracast for the first time.

FIRST USE: UPDATE REQUIRED
1

Download the App

Install Avantree–Avantalk on your phone.

Download on the App StoreGet it on Google Play
2

Pair and add the earbuds

Select Avantalk Infinity NC in phone Bluetooth settings. In the App, tap Add Device → Infinity NC → Connect.

3

Complete the first update

Accept the App’s automatic firmware pop-up and follow the DFU steps.

Wait for “Completed.” You must reset the earbuds before continuing.
4

Reset the earbuds

Choose one method:

Option A · In the AppEarbuds Settings → Reset to factory default settings
OR
Option B · On the earbudsPut both earbuds in the case → hold the case button for 8 seconds.
Earbud reset result: both LEDs turn solid pink, then flash red and blue.
Next: phone Bluetooth list → select Avantalk Infinity NC again.
5

Scan and join

Start the broadcast. In the App, tap Auracast → Scan, then choose the broadcast.

Nothing listed? Move within 2 m / 6 ft and scan again.
6

Save it

Tap the broadcast’s ⓘ → Save.

The device view may disappear while listening to Auracast. This is a mode change, not necessarily a fault.
Select Avantalk Infinity NC Single Pack from the Avantalk App device list1. Add Infinity NC
Tap Auracast on the Avantalk Infinity NC App screen2. Tap Auracast
Choose an available Auracast broadcast in the App3. Choose and save
1 / 3

Firmware Update details

Troubleshooting

What is happening?

Choose one symptom.

Reconnect the App

  1. Close the App.
  2. Confirm Avantalk Infinity NC is connected in phone Bluetooth settings.
  3. Reopen the App and tap Add Device → Infinity NC → Connect.
Expected: the Infinity NC device screen opens.
Still missing? Put both earbuds in the case and hold the case button for 3 seconds to enter pairing mode. Pair again, then add them in the App. If it still fails, submit a support ticket.

Return to App control

The normal device view may disappear while the earbuds receive Auracast.

  1. Leave the broadcast if that control is available.
  2. Return both earbuds to the case, then take them out together.
  3. Reconnect Infinity NC in phone Bluetooth settings and reopen the App.
Expected: the normal Infinity NC device screen returns.
Still missing? Reset with the 8-second case-button step, or submit a support ticket.
FIRMWARE UPDATE · DFU

Keep Infinity NC firmware up to date.

Use the Avantree–Avantalk App when an update is available. A factory reset after the update is required.

  1. 1
    ConnectInstall Avantree–Avantalk, then pair Infinity NC with the phone and add it in the App.
    Download on the App StoreGet it on Google Play
  2. 2
    UpdateAccept the pop-up and follow the DFU instructions.
  3. 3
    Wait for “Completed”Do not continue until the App confirms that the update is complete.
  4. 4
    Reset the earbuds — requiredChoose one method:
    In the AppEarbuds Settings → Reset to factory default settings
    OR
    On the earbudsBoth earbuds in case → hold the case button for 8 seconds.
    Result: both LEDs turn solid pink, then flash red and blue.
  5. 5
    Reconnect in phone BluetoothOpen the phone’s Bluetooth list and select Avantalk Infinity NC again. Then reopen the App.
Notify me about updatesView the detailed App guide →

After every update: reset the earbuds first, then select Avantalk Infinity NC again in the phone’s Bluetooth list.

Reference

Official help

Firmware updates are delivered inside the App.

Download PDF ManualComplete offline setup and troubleshooting guide. Infinity NC FAQ & troubleshootingButtons, reset, one-side sound and charging. App & firmware update guideOpen the device screen → gear icon → Update Now. Infinity NC product pageSpecifications, compatibility and Setup & Support entry.