1. Sicherheitshinweise
To ensure safe operation and prevent damage, please observe the following guidelines:
- Do not use the device in moist or underwater conditions.
- Avoid using the device near heaters or high-temperature surfaces.
- Do not expose the device to direct and strong sunlight for extended periods.
- Do not dismantle the device without proper authorization.
2. Packungsinhalt
The IMDEN Bluetooth FM Transmitter package includes the following items:
- 1x IMDEN Bluetooth FM Transmitter with Dual USB Charge Port
- 1x Benutzerhandbuch
3. Produktüberschreitungview
The IMDEN C57 Bluetooth FM Transmitter is designed to enhance your in-car audio experience by providing wireless music streaming, hands-free calling, and fast charging capabilities. It features a compact design with an LED digital display.

Figure 3.1: IMDEN Bluetooth FM Transmitter C57. This image displays the main unit of the FM transmitter, showcasing its compact design, dual USB ports, and digital display.

Figure 3.2: IMDEN Bluetooth FM Transmitter C57 in use. This image illustrates the device plugged into a car's cigarette lighter socket, highlighting its integrated buttons for call management and track control, along with the digital display showing the FM frequency.
4. Einrichtungsanweisungen
- In die Autosteckdose einstecken: Plug the IMDEN C57 FM Transmitter into your car's cigarette lighter socket. The device will power on automatically and display the car battery voltage briefly.
- FM-Frequenz einstellen: Tune your car radio to an empty FM frequency (one with no active broadcast). Then, adjust the FM Transmitter to match this frequency. To adjust the transmitter's frequency, press and hold the multi-function button (phone icon) until the frequency display flashes, then use the track skip buttons (<< and >>) to change the frequency. Press the multi-function button again to confirm.
- Mit Bluetooth koppeln: On your mobile device, enable Bluetooth and search for available devices. Select 'C57' (or similar name) from the list to pair. Once paired, the device will confirm with a voice prompt.

Figure 4.1: Stable connection and clear sound. This image shows the FM transmitter connected and playing music, indicating a stable Bluetooth connection and clear audio transmission to the car's stereo.
5. Bedienungsanleitung
5.1 Freisprechfunktion
- Anruf annehmen: Press the multi-function button (phone icon) once to answer an incoming call.
- Anruf beenden: Drücken Sie während eines Anrufs einmal die Multifunktionstaste, um den Anruf zu beenden.
- Anruf ablehnen: Halten Sie die Multifunktionstaste gedrückt, um einen eingehenden Anruf abzulehnen.
- Wahlwiederholung letzte Nummer: Durch zweimaliges Drücken der Multifunktionstaste kann die zuletzt gewählte Nummer erneut gewählt werden.

Figure 5.1: Hands-free calling in a car. This image depicts a driver safely making a call using the FM transmitter's hands-free function, emphasizing the convenience and safety of the feature.
5.2 Musikwiedergabe
- Bluetooth-Streaming: Once paired, music from your mobile device will stream wirelessly to your car's stereo via the set FM frequency.
- Wiedergabe von USB-Laufwerk: Stecken Sie einen USB-Stick mit MP3 ein files into the designated USB port (the one not labeled QC3.0). The device will automatically detect and play music from the drive.
- Abspielen/Pause: Durch einmaliges Drücken der Multifunktionstaste kann die Musikwiedergabe gestartet oder gestoppt werden.
- Nächster / Vorheriger Track: Use the 'Next Track' (>>) and 'Previous Track' (<<) buttons to skip tracks.

Figure 5.2: Music playback via Bluetooth. This image shows a smartphone connected to the FM transmitter, displaying music playback information, with the transmitter's screen showing the FM frequency.
5.3 Ladegeräte
The IMDEN C57 features dual USB ports for charging:
- One Quick Charge 3.0 port for rapid charging compatible devices.
- One standard USB port for charging or USB drive music playback.

Figure 5.3: Smart Quick Charge 3.0 in action. This image illustrates the FM transmitter plugged into a car's power outlet, with a smartphone connected to its Quick Charge 3.0 USB port, demonstrating fast charging capability.
5.4 Sprachnavigation
When your phone is connected via Bluetooth, voice navigation prompts from your phone will be broadcast through your car's stereo system, providing clear directions without needing to look at your phone.

Figure 5.4: Voice navigation support. This image shows the FM transmitter in a car, with a smartphone displaying a navigation map, indicating that voice directions are transmitted through the car's audio system.
6. Hauptmerkmale
- Bluetooth 5.3-Technologie: Ensures stable connection and high-quality audio transmission.
- Dual USB Ports: Includes one Quick Charge 3.0 port and one standard USB port for simultaneous charging and music playback.
- Freisprechen: Built-in microphone with Echo Cancellation and Noise Reduction (CVC) technology for clear calls.
- Musikwiedergabe: Supports music streaming via Bluetooth and playback from USB flash drives (MP3 format).
- Batterie Voltage-Erkennung: Displays car battery voltage upon power-on and provides low voltagDie Warnungen.
- Breite Kompatibilität: Compatible with all Bluetooth-enabled devices and various car models (12V-24V).
- Multi-Sicherheitsschutz: Features over-current, over-voltage, intelligente Temperaturregelung und Kurzschlussschutz.
7. Fehlerbehebung
If you encounter issues with your IMDEN C57 FM Transmitter, please refer to the following common solutions:
| Problem | Mögliche Ursache/Lösung |
|---|---|
| Kein Strom / Gerät schaltet sich nicht ein | Ensure the device is securely plugged into the car's cigarette lighter socket. Check if the car's power outlet is functional. |
| Statisches Rauschen oder schlechte Audioqualität | Adjust the FM frequency on both the transmitter and your car radio to an unused channel. Avoid frequencies near strong radio stations. Ensure the volume on your phone and car stereo is appropriately set. |
| Bluetooth stellt keine Verbindung her | Ensure Bluetooth is enabled on your mobile device. Forget the device from your phone's Bluetooth settings and attempt to re-pair. Restart both the transmitter (by unplugging and replugging) and your phone. |
| Die Gesprächsqualität im Freisprechmodus ist schlecht. | Ensure the microphone is not obstructed. Reduce background noise in the car. Adjust the volume on your car stereo. |
| Musikwiedergabe vom USB-Stick wird nicht abgespielt | Stellen Sie sicher, dass der USB-Stick korrekt formatiert ist und unterstützte Audiodateien enthält. files (MP3). Insert the USB drive into the correct port (the one not labeled QC3.0). |
8. Spezifikationen
- Modell: C57
- Produktabmessungen: 1.9 x 2.9 x 4.4 Zoll
- Artikelgewicht: 2.82 Unzen
- Konnektivitätstechnologie: Bluetooth, USB
- Bluetooth-Version: 5.3 (gemäß Produktbezeichnung)
- Energiequelle: Corded Electric (Car cigarette lighter)
- Material: Plastik
- Besondere Merkmale: Bluetooth FM transmitter for car, Built-In Microphone, Fast Charging (QC3.0), Multi-Safety Protection
- Hersteller: IMDEN
9. Garantie und Support
For warranty information or technical support, please refer to the contact details provided with your purchase documentation or visit the official IMDEN webWebsite. Bewahren Sie Ihren Kaufbeleg für Garantieansprüche auf.