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Grey rectangular Bluetooth adapter with LCD display, touch controls, optical and 3.5mm ports, external antenna

Ainostone AS0401-GREY-2 Bluetooth 5.3 Transmitter Receiver

SKU CH-MAZR-RQG56

Bluetooth 5.3 adapter adds wireless streaming to any audio device with optical, 3.5 mm or RCA inputs and supports two headphones at once

  • Sales unit1
  • Connection typesPower Cable, false
  • Power supplyPower Cable, false
  • Cabinet materialAcrylonitrile Butadiene Styrene (ABS)
  • Remote controllerTouch
  • Size and weight14.33 in W × 12.83 in H × 9.06 in D
  • Wireless range up to 45 feet with Bluetooth 5.3
  • Connect two headphones simultaneously in transmitter or receiver mode
  • Bypass mode keeps soundbar active while adding wireless headphones
  • Optical, 3.5 mm AUX and RCA inputs cover most home audio gear
  • LCD display plus touch controls for quick mode and volume changes

Dual Bluetooth 5.3 adapter for TV audio

The Ainostone AS0401-GREY-2 adds wireless streaming to any device with an optical, 3.5 mm AUX or RCA output. It operates as a transmitter for headphones or speakers, a receiver for phones or tablets, and a bypass unit that keeps a soundbar active while a second listener uses Bluetooth. Two Bluetooth devices can stay connected at once in either TX or RX mode.

Replaces tangled cables and single-listener limits

The 3-in-1 design removes the need for separate transmitter and receiver dongles when you want both TV-to-headphone and phone-to-stereo paths. The bypass mode is worth the switch when a household wants the TV soundbar and a Bluetooth headset running together with independent volume control. It does not support amplifiers or converters that lack a direct audio output.

Plug the Type-C power cable, pick TX, RX or BYPASS.

The LCD display shows the active mode and connection status, while the touch remote handles volume and power. Automatic re-pairing restores the last link on power-up. The main setup issue is selecting the wrong mode for the connected port; the manual must be followed to match the optical or AUX input to the chosen operating mode.

How it compares

Measured against everything we stock in Wi-Fi & Bluetooth Audio Devices, at today’s prices. Recalculated every night.

Price $41.99
Cheaper than about 66% of the 297 comparable items (median $63.99).

Specifications

Product
Brand nameAinostone
Product lineAS0401-GREY-2
Model nameAS0401-GREY-2
Part numberAS0401-GREY-2
Product colorGrey
Ports & slots
Connection typesPower Cable, false
Power
Power supplyPower Cable, false
Size & build
Cabinet materialAcrylonitrile Butadiene Styrene (ABS)
Size and weight14.33 in W × 12.83 in H × 9.06 in D
In the box
Sales unit1
In the boxPower Cable
More details
Remote controllerTouch

Questions about this item

What connectors does the Ainostone AS0401-GREY-2 need on my TV or stereo?

It connects through 3.5 mm AUX, optical or 3.5 mm to RCA cables, all included in the box.

Which mode do I select first, and what step do people miss?

Choose TX, RX or Bypass before pairing; the manual stresses setting the correct mode or the adapter will not transmit or receive audio.

Will the internal battery need replacing, and how is it charged?

The unit has no user-replaceable battery; it runs from the supplied Type-C 5 V power cable.

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