【Auracast】Avantree Audikast4 New, Unused

This is the Avantree completely wireless earphone Infinity NC (ATBH-TW150).
Purchased in January 2026, this is a new, unused manufacturer replacement item. It has been opened once for photography for this listing.

By using this in conjunction with the Infinity NC also listed separately, you can achieve stable reconnection (automatic return when power is turned on) during Auracast connection.
While many devices struggle with Auracast reconnection, this configuration achieved 100% stable reconnection. Recommended for those who want to build a stable Auracast environment.

It also connected via Bluetooth (aptX Adaptive, aptX HD, SBC) with wireless earphones other than Infinity NC.

[Product Details]
- Bluetooth Audio Transmitter (Auracast Compatible)
- Bluetooth Version: 5.4
- Supported Codecs: LC3 / aptX Adaptive / aptX HD / SBC
- Communication Method: Auracast Broadcast / A2DP
- Simultaneous Connection: Multiple connections (Auracast)
- Communication Distance: Up to approx. 100m (line of sight)
- Input Terminals: Optical Digital (TOSLINK) / 3.5mm AUX / USB-C
- Power Supply: USB powered (no battery)
- Dimensions: Approx. 73 × 68 × 67 mm
- Features: Can broadcast TV audio to multiple devices via Auracast

[Condition]
- New, unused (replacement item, opened only for photography)

[Included Items]
- Main unit
- Power cable
- Connection cables (Optical / AUX)