---
product_id: 720547770
title: "TUNAI Firefly: World's Smallest Bluetooth Receiver w/ 3.5mm AUX for Wireless Clear Audio Quality Music Streaming - Car Pack (Black)"
brand: "tunai"
price: "€ 0.74"
currency: EUR
in_stock: false
url: https://www.desertcart.pt/products/720547770-tunai-firefly-worlds-smallest-bluetooth-receiver-w-3-5mm-aux
store_origin: PT
region: Portugal
---

# No charging needed, auto power-on Crystal-clear AAC/MP3 sound Auto-reconnects up to 8 devices TUNAI Firefly: World's Smallest Bluetooth Receiver w/ 3.5mm AUX for Wireless Clear Audio Quality Music Streaming - Car Pack (Black)

**Brand:** tunai
**Price:** € 0.74
**Availability:** ❌ Out of Stock

## Summary

> 🎧 Tiny Tech, Massive Sound – Stay Connected, Stay Ahead!

## Quick Answers

- **What is this?** TUNAI Firefly: World's Smallest Bluetooth Receiver w/ 3.5mm AUX for Wireless Clear Audio Quality Music Streaming - Car Pack (Black) by tunai
- **How much does it cost?** € 0.74 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/720547770-tunai-firefly-worlds-smallest-bluetooth-receiver-w-3-5mm-aux)

## Best For

- tunai enthusiasts

## Why This Product

- Trusted tunai brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual Device Sharing:** Connect two devices simultaneously and share your playlist without missing a beat.
- • **Effortless Auto-Connect:** Automatically pairs with your last device and remembers up to 8 for instant streaming.
- • **Plug & Play Convenience:** No charging, no fuss—powers on with your car or speaker for uninterrupted music flow.
- • **Audiophile-Grade Clarity:** Experience crystal-clear AAC and MP3 sound quality that rivals wired connections.
- • **Seamless Wireless Upgrade:** Transform any AUX stereo into a Bluetooth powerhouse with one simple plug-in.

## Overview

The TUNAI Firefly is the world’s smallest Bluetooth 4.2 receiver with a 3.5mm AUX connection, designed to effortlessly convert any car or home stereo into a wireless streaming hub. Weighing just 11 grams, it auto-powers on without charging, remembers up to 8 paired devices, supports dual simultaneous connections, and delivers crystal-clear AAC/MP3 audio quality for a premium listening experience.

## Description

TUNAI TUNAI Firefly Bluetooth Receiver: World's Smallest Wireless Audio Bluetooth 4.2 Adapter with 3.5mm AUX for Car/Home Stereo Music Streaming; Auto On, No Charging Needed - Car Kit (Black)

## Features

- SIMPLE and EFFECTIVE: Transforms your home stereo and car audio sound systems into wireless and Bluetooth compatible speakers with just one, easy-to-use plug. No charging needed Firefly automatically switches on when you start your engine or turn on your speaker
- GREAT SOUND QUALITY: We promise crystal clear AAC/MP3 sound quality or your and NO annoying voice prompts telling you your device is connected
- AUTOMATICALLY RECONNECT and DUAL CONNECTION: Remembers up to 8 paired devices so you can connect as soon as Bluetooth is switched on - auto-connects to the last device used
- DUAL CONNECTION SEAMLESS SHARING: Can pair up to 2 devices at the same time to make music sharing even easier

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01HDO66NK |
| Audio Input | 3.5mm AUX |
| Audio Output Mode | Stereo |
| Audio Output Type | auxiliary, bluetooth |
| Bluetooth support? | Yes |
| Brand Name | TUNAI |
| Colour | multicolour |
| Compatibility Options | MP3 Player, Speaker, Car Stereo, Home Stereo, Bluetooth-enabled devices |
| Compatible Devices | MP3 Player, Speaker |
| Connectivity Technology | AUX, Bluetooth |
| Connector Type Used on Cable | Auxiliary |
| Control Method | App |
| Control Type | music control |
| Customer Reviews | 4.3 4.3 out of 5 stars (5,855) |
| Hardware Interface | Bluetooth, Bluetooth 5, USB |
| Human Interface Input | Buttons |
| Includes Remote | No |
| Installation Type | wired |
| Item Weight Unit of Measure | 11 Grams |
| Manufacturer | TUNAI |
| Number of Channels | 2 |
| Number of Ports | 2 |
| Power Source | adapter |
| Rechargeable Battery Included | No |
| Supported Application | Any |
| Supported Media Type | MP3, AAC |
| Supported Standards | Bluetooth 4.2 |
| Voltage | 5 Volts |
| Wireless Compability | Bluetooth |

## Product Details

- **Brand:** TUNAI
- **Colour:** multicolour
- **Connectivity Technology:** AUX, Bluetooth
- **Item Weight:** 11 Grams
- **Power Source:** adapter

## Images

![TUNAI Firefly: World's Smallest Bluetooth Receiver w/ 3.5mm AUX for Wireless Clear Audio Quality Music Streaming - Car Pack (Black) - Image 1](https://m.media-amazon.com/images/I/31ONZZIWdQL.jpg)
![TUNAI Firefly: World's Smallest Bluetooth Receiver w/ 3.5mm AUX for Wireless Clear Audio Quality Music Streaming - Car Pack (Black) - Image 2](https://m.media-amazon.com/images/I/41t4sopGRQL.jpg)
![TUNAI Firefly: World's Smallest Bluetooth Receiver w/ 3.5mm AUX for Wireless Clear Audio Quality Music Streaming - Car Pack (Black) - Image 3](https://m.media-amazon.com/images/I/516ysR2BizL.jpg)
![TUNAI Firefly: World's Smallest Bluetooth Receiver w/ 3.5mm AUX for Wireless Clear Audio Quality Music Streaming - Car Pack (Black) - Image 4](https://m.media-amazon.com/images/I/51Nw2bezpSL.jpg)
![TUNAI Firefly: World's Smallest Bluetooth Receiver w/ 3.5mm AUX for Wireless Clear Audio Quality Music Streaming - Car Pack (Black) - Image 5](https://m.media-amazon.com/images/I/510W6ZcaHGL.jpg)

## Questions & Answers

**Q: Will the device turn off automatically if BT is paired but no audio is playing? I have another that shuts off after 5 min, even when paired.**
A: No, which makes this device slightly inconvenient for cars with power ports that stay on even when the car is off (like my 2010 Audi A3) since it won’t automatically reconnect in that case.  However I found a workaround by installing one of these switches on the power line.  I hide the switch under the console and just switch it on and the Tunai will automatically reconnect.  

JBtek Male to Female USB Cable with ON/OFF Switch - Easy Start/Reboot for Raspberry Pi & Arduino https://www.amazon.com/dp/B00UR321B6/ref=cm_sw_r_cp_tai_pQgLBb9GCQ51Q

**Q: Can this be used to connect the entertainment unit (movies and /or music) in the airplane to a set of bluetooth wireless headphones**
A: Interesting thought, but no. Regardless of what regulations may or may not say, this device is a Bluetooth RECEIVER only, much like output-only headphones (without a mic) are. What you would need is a Bluetooth TRANSMITTER or TRANSCEIVER to send the data to your headphones.

**Q: My car has bluetooth for phone so will this be a problem? when i get in car and auto connect to both will calls still work with my cars hands free?**
A: The beauty of this product is that will not interfere at all with your cars Bluetooth phone connection. It will just do audio. Every other product I tried interfered with phone calling because they were all designed to do both. This device is perfect for the older car with Bluetooth phone and an audio Jack input for music

**Q: Hi, is it normal that I hear a hard noice, kind of like unplugging aux cable noise, each time switching between apps or unlocking the phone?**
A: Thanks for the great question. That is not normal. Are you able to try the Firefly with another phone to see if the issue is also present? Please write to us so we can help you more directly: care@truetosource.co. 

Looking forward to hearing from you. 

TrueToSource Customer Care

## Frequently Bought Together

- TUNAI Firefly LDAC Bluetooth Receiver: High Resolution Wireless Audio Bluetooth 5.0 Adapter with Audiophile USB DAC 3.5mm AUX for Car/Home Stereo Hi Res Music Streaming; Auto On, No Charging Needed
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**Shop now:** [https://www.desertcart.pt/products/720547770-tunai-firefly-worlds-smallest-bluetooth-receiver-w-3-5mm-aux](https://www.desertcart.pt/products/720547770-tunai-firefly-worlds-smallest-bluetooth-receiver-w-3-5mm-aux)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-19*