Einführung
Thank you for choosing the eppfun LE Audio APTX-Lossless Adaptive Bluetooth 5.4 Transmitter. This device allows you to wirelessly transmit audio from various sources to Bluetooth-enabled headphones or speakers, supporting high-quality, low-latency audio and Auracast broadcast functionality.
Packungsinhalt
- eppfun LE Audio Bluetooth 5.4 Transmitter
- USB-C-Ladekabel
- 3.5-mm-AUX-Audiokabel
- Optisches digitales Audiokabel
Notiz: In Bluetooth mode, only one Bluetooth device can be connected. Auracast mode supports an unlimited number of connections.
Produkt überview

Bild: Draufsicht view of the eppfun LE Audio Bluetooth 5.4 Transmitter, showing its compact design, external antenna, and various input/output ports.
The eppfun LE Audio Bluetooth 5.4 Transmitter features a compact design with multiple audio input options and intuitive controls. An external antenna ensures stable signal transmission.
Komponentenidentifikation:
- LED-Anzeigen: Display connection status and active audio codec.
- Netzschalter: For turning the device on/off and initiating pairing.
- Koaxialer Eingang: For connecting to audio sources via coaxial cable.
- Optischer Eingang: For connecting to audio sources via optical digital cable.
- DC 5V Eingang (USB-C): For power supply and charging.
- AUX-Eingang: For connecting to audio sources via 3.5mm AUX cable.
- Antennenanschluss: For attaching the external antenna to enhance signal range and stability.
Aufstellen
1. Ein-/Ausschalten
- To turn on: Press and hold the power button until the LED indicators light up.
- To turn off: Press and hold the power button until the LED indicators turn off.
- The device will automatically attempt to connect to previously paired devices upon startup.
2. Anschluss an eine Audioquelle
Wählen Sie eine der folgenden Eingabemethoden:
- Optische digitale Verbindung: Connect the optical cable from your TV or audio source to the transmitter's OPTIK Eingang.
- AUX-Anschluss: Connect the 3.5mm AUX cable from your TV or audio source to the transmitter's AUX Eingang.
- Koaxialanschluss: Connect the coaxial cable from your TV or audio source to the transmitter's KOAXIAL Eingang.
3. Pairing with Bluetooth Headphones/Speakers (TX Mode)

Image: This diagram illustrates connecting the eppfun Bluetooth transmitter to a TV via an audio cable, then wirelessly transmitting audio to a pair of Bluetooth headphones. This setup allows for private listening from a TV or PC.
- Ensure the transmitter is powered on and connected to your audio source.
- Put your Bluetooth headphones or speakers into pairing mode (refer to their respective manuals).
- Press the pairing button on the eppfun transmitter. The LED indicator will flash, indicating it is in pairing mode.
- Once connected, the LED will show a steady light, and the active codec indicator will illuminate.
Notiz: For optimal audio quality and low latency, ensure your receiving device supports the same high-quality codec (e.g., APTX Lossless Adaptive) as the transmitter.
Betriebsarten
1. Sendermodus (TX)

Image: A person is shown relaxing on a rug, watching TV with headphones connected wirelessly to the eppfun Bluetooth transmitter. This setup enables personal audio enjoyment without disturbing others.
In TX mode, the device wirelessly transmits audio from a non-Bluetooth audio source (such as a TV or PC) to Bluetooth headphones or speakers. Supported codecs include LE Audio, APTX Lossless, APTX Adaptive, APTX HD, APTX, and SBC. For optimal performance, ensure your receiving device supports the same high-quality codec.
2. Auracast Mode (Broadcast Audio)

Image: This diagram illustrates the Auracast Broadcast Mode, where the eppfun transmitter connected to a TV can broadcast audio to multiple Bluetooth headphones simultaneously, indicated by several headphone icons receiving the signal.
The transmitter supports LE Audio with LC3+ codec, enabling Auracast broadcast audio. This allows an unlimited number of Auracast-compatible Bluetooth receivers to connect simultaneously and receive audio. This mode is ideal for sharing audio with multiple users in a public or group setting.
To activate Auracast mode, refer to the specific instructions for your Auracast-compatible receiving devices and the transmitter's mode selection controls.
LED-Anzeigen
The device features LED indicators that provide clear visual feedback on its operational state, including connection status and the active audio codec (e.g., LE Audio, APTX Lossless, APTX Adaptive, SBC).
Consult the product's quick start guide for a detailed explanation of each LED pattern and its corresponding status.
Wartung
- Halten Sie das Gerät sauber und trocken. Verwenden Sie zum Reinigen ein weiches, trockenes Tuch.
- Vermeiden Sie die Einwirkung extremer Temperaturen, Feuchtigkeit oder direkter Sonneneinstrahlung.
- Versuchen Sie nicht, das Gerät selbst zu zerlegen oder zu reparieren. Dadurch kann die Garantie erlöschen.
- Bewahren Sie das Gerät bei Nichtgebrauch an einem sicheren Ort auf, um Schäden zu vermeiden.
Fehlerbehebung
Kein Ton oder schlechte Tonqualität:
- Stellen Sie sicher, dass alle Audiokabel fest mit der Audioquelle und dem Sender verbunden sind.
- Verify that the audio source is playing sound and its volume is set to an adequate level.
- Check that the transmitter is correctly paired with your headphones/speakers and the appropriate audio codec is active (indicated by the LEDs).
- If experiencing static or noise, try moving the transmitter away from other electronic devices, power outlets, or Wi-Fi routers, as electrical interference can affect audio quality.
- Ensure your receiving device supports the same high-quality codec as the transmitter for optimal audio performance.
Kopplungsprobleme:
- Ensure both the transmitter and your receiving device are in pairing mode.
- Löschen Sie die vorherigen Kopplungsprotokolle auf beiden Geräten und versuchen Sie, die Kopplung erneut durchzuführen.
- Ensure no other Bluetooth devices are actively trying to pair or are too close, which might interfere with the pairing process.
Automatisches Ausschalten:
- The device may have an automatic power-off feature if no connection is established or no audio signal is detected for a certain period. To restart, simply press the power button.
Dual Audio (Echo) or Audio Delay:
- If you hear dual audio or an echo, ensure only one audio output method is active on your source device (e.g., turn off TV speakers if using headphones).
- While the device supports low latency, some specific headphone models or codec combinations might introduce slight delays. Try switching to a different codec if your receiving device supports it.
Technische Daten
| Modellnummer | AKR |
| Marke | Abonnieren |
| Konnektivitätstechnologie | AUX, Bluetooth, Optical Digital, Coaxial |
| Wireless-Technologie | Bluetooth 5.4 (LE Audio, APTX-Lossless Adaptive, Auracast) |
| Kompatible Geräte | Speakers, Televisions, Laptops |
| Material | Acrylnitril-Butadien-Styrol (ABS), Metall |
| Stromquelle | Battery Powered (Internal battery) |
| Batterie im Lieferumfang enthalten | Ja |
| Verwendete Batterie | Ja |
| Andere Eigenschaften | Hands-free calling, Low Latency |
| Maße | 17.4 x 12.8 x 2.9 cm; 230 g |
| Frequenzband | 2.402 GHz – 2.480 GHz |
| Ladezeit | Ca. 2.5 Stunden |
| Kommunikationsreichweite | Max 30m (98 feet) |
| Bluetooth Operation Time | 12 Stunden |
| Auracast Operation Time | 8 Stunden |
Garantie und Support
eppfun provides a 12-month warranty for this product, ensuring quality and customer satisfaction. If you have any questions, encounter issues, or require technical support, please contact eppfun customer service through the retailer's platform or the official eppfun website. We are committed to resolving your concerns as quickly and efficiently as possible.