---
product_id: 249169308
title: "TUNAI Firefly Bluetooth Receiver: World’s Smallest USB Wireless Audio Bluetooth 4.2 Adapter with 3.5mm AUX for Car/Home Stereo Music Streaming; Auto On, No Charging Needed - Car Kit (Black)"
brand: "tunai"
price: "FREE"
currency: RON
in_stock: false
reviews_count: 8
url: https://www.desertcart.ro/products/249169308-tunai-firefly-bluetooth-receiver-world-s-smallest-usb-wireless-audio
store_origin: RO
region: Romania
---

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

**Brand:** tunai
**Price:** FREE
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Streamline Your Sound Experience!

## Quick Answers

- **What is this?** TUNAI Firefly Bluetooth Receiver: World’s Smallest USB Wireless Audio Bluetooth 4.2 Adapter with 3.5mm AUX for Car/Home Stereo Music Streaming; Auto On, No Charging Needed - Car Kit (Black) by tunai
- **How much does it cost?** FREE with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/249169308-tunai-firefly-bluetooth-receiver-world-s-smallest-usb-wireless-audio)

## 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

- • **Compact Design:** The world's smallest USB audio adapter fits anywhere effortlessly.
- • **Hassle-Free Use:** Automatic on/off functionality means no more fumbling with buttons.
- • **Seamless Streaming:** Experience crystal-clear audio with Bluetooth 4.2 technology.
- • **No Charging Required:** Enjoy uninterrupted music streaming without the need for charging.
- • **Universal Compatibility:** Easily connects to any car or home stereo with a 3.5mm AUX input.

## Overview

The TUNAI Firefly Bluetooth Receiver is the ultimate solution for wireless audio streaming, featuring Bluetooth 4.2 technology, a compact design, and automatic on/off functionality, making it perfect for both car and home stereo systems.

## Description

Buy TUNAI Firefly Bluetooth Receiver: World’s Smallest USB Wireless Audio Bluetooth 4.2 Adapter with 3.5mm AUX for Car/Home Stereo Music Streaming; Auto On, No Charging Needed - Car Kit (Black) online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: Good - Good
Review: Connectivity issues - Hard to connect to, had to go back to the older Ugreen Bluetooth that one is much more stable and has a feedback when connected although this looks better in terms of build quality and app support tried to use it for couple of days but unfortunately it was useless. Wanted to rate it 1/5 but added one star gor quality and another star for their customization app

## Features

- Automatic On/Off

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01HXXJPWK |
| Additional Features | Automatic On/Off |
| Audio Input | 3.5mm AUX |
| Audio Output Mode | Stereo |
| Audio Output Type | auxiliary |
| Battery Type | Lithium-Ion |
| Best Sellers Rank | #106,544 in Electronics ( See Top 100 in Electronics ) #131 in Bluetooth Car Kits |
| Bluetooth support? | Yes |
| Brand | TUNAI |
| Color | Black |
| Compatibility Options | Home Stereo System, Speaker |
| Compatible Devices | Home Stereo System, Speaker |
| Compatible with Vehicle Type | Car |
| Connectivity Technology | AUX, Bluetooth, USB |
| Connectivity technology | AUX , Bluetooth, USB |
| Connector Type Used on Cable | Auxiliary |
| Control Method | Touch |
| Controller Type | Touch Control |
| Customer Reviews | 4.3 out of 5 stars 3,851 Reviews |
| Data Link Protocol | L2CAP |
| Enclosure Material | Aluminum |
| Hardware Interface | Bluetooth |
| Human Interface Input | Buttons |
| Includes Remote | No |
| Installation Type | plug-and-play |
| Item Dimensions L x W x H | 42L x 14W x 6H millimeters |
| Item Weight | 10 Grams |
| Manufacturer | TUNAI |
| Material | Aluminum |
| Model Name | Firefly |
| Number of Channels | 2 |
| Outer Material | Aluminum |
| Power Source | Battery Powered |
| Power source | Battery Powered |
| Product dimensions | 42L x 14W x 6H millimeters |
| Rechargeable Battery Included | No |
| Special features | Automatic On/Off |
| Supported Application | Any |
| Supported Media Type | MP3 |
| Supported Standards | Bluetooth 4.2 |
| UPC | 603658226008 |
| Voltage | 5 Volts (DC) |
| Wireless Compability | Bluetooth |

## Product Details

- **Special features:** Automatic On/Off
- **Brand:** TUNAI
- **Connectivity technology:** Bluetooth, USB, AUX
- **Power source:** Car's Electrical System
- **Material:** Aluminum

## Images

![TUNAI Firefly Bluetooth Receiver: World’s Smallest USB Wireless Audio Bluetooth 4.2 Adapter with 3.5mm AUX for Car/Home Stereo Music Streaming; Auto On, No Charging Needed - Car Kit (Black) - Image 1](https://m.media-amazon.com/images/I/61Oy-i96BZL.jpg)
![TUNAI Firefly Bluetooth Receiver: World’s Smallest USB Wireless Audio Bluetooth 4.2 Adapter with 3.5mm AUX for Car/Home Stereo Music Streaming; Auto On, No Charging Needed - Car Kit (Black) - Image 2](https://m.media-amazon.com/images/I/61+5XcF3dGL.jpg)
![TUNAI Firefly Bluetooth Receiver: World’s Smallest USB Wireless Audio Bluetooth 4.2 Adapter with 3.5mm AUX for Car/Home Stereo Music Streaming; Auto On, No Charging Needed - Car Kit (Black) - Image 3](https://m.media-amazon.com/images/I/71VGzaSlLVL.jpg)
![TUNAI Firefly Bluetooth Receiver: World’s Smallest USB Wireless Audio Bluetooth 4.2 Adapter with 3.5mm AUX for Car/Home Stereo Music Streaming; Auto On, No Charging Needed - Car Kit (Black) - Image 4](https://m.media-amazon.com/images/I/71d6-Amm8wL.jpg)
![TUNAI Firefly Bluetooth Receiver: World’s Smallest USB Wireless Audio Bluetooth 4.2 Adapter with 3.5mm AUX for Car/Home Stereo Music Streaming; Auto On, No Charging Needed - Car Kit (Black) - Image 5](https://m.media-amazon.com/images/I/71S6w0idnXL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good
*by J***I on 28 March 2021*

Good

### ⭐⭐⭐ Connectivity issues
*by A***M on 14 November 2022*

Hard to connect to, had to go back to the older Ugreen Bluetooth that one is much more stable and has a feedback when connected although this looks better in terms of build quality and app support tried to use it for couple of days but unfortunately it was useless. Wanted to rate it 1/5 but added one star gor quality and another star for their customization app

### ⭐ Issues with auto connection
*by E***R on 12 July 2022*

Hi got it few days ago, the sound is great but I have a big problem. The system is NOT automatically connecting when the engine is just starting, it is having few failuer and I need to unplug it few time to get it work. PLEASE HELP, don't want to change it maybe there is a solution for it? I am using Samsung s21 ultra shouldn't have issues.

## Frequently Bought Together

- TUNAI Firefly LDAC Bluetooth Adapter: Hifi Wireless Audio Bluetooth 5.0 Receiver with Audiophile USB DAC 3.5mm AUX for Car/Home Stereo Hi Res Music Streaming; Auto On, No Charging Needed
- Anker Car Charger, Mini Aluminum Alloy 24W Dual USB Car Charger, PowerDrive 2 Alloy Car Adapter with Blue LED for iPhone12/11/XR/Xs, iPad Pro/Air 2/mini, Galaxy (Not Compatible with Quick Charge)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ro/products/249169308-tunai-firefly-bluetooth-receiver-world-s-smallest-usb-wireless-audio](https://www.desertcart.ro/products/249169308-tunai-firefly-bluetooth-receiver-world-s-smallest-usb-wireless-audio)

---

*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-08-31*