1. Safety Information
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. Package Contents
The IMDEN Bluetooth FM Transmitter package includes the following items:
- 1x IMDEN Bluetooth FM Transmitter with Dual USB Charge Port
- 1x User Guide
3. Product Overview
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. Setup Instructions
- Insert into Car Socket: 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.
- Set FM Frequency: 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.
- Pair with Bluetooth: 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. Operating Instructions
5.1 Hands-Free Calling
- Answer Call: Press the multi-function button (phone icon) once to answer an incoming call.
- End Call: Press the multi-function button once during a call to end it.
- Reject Call: Press and hold the multi-function button to reject an incoming call.
- Redial Last Number: Double-press the multi-function button to redial the last dialed number.
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 Music Playback
- Bluetooth Streaming: Once paired, music from your mobile device will stream wirelessly to your car's stereo via the set FM frequency.
- USB Drive Playback: Insert a USB flash drive containing MP3 files into the designated USB port (the one not labeled QC3.0). The device will automatically detect and play music from the drive.
- Play/Pause: Press the multi-function button once to play or pause music.
- Next/Previous 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 Charging Devices
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 Voice Navigation
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. Key Features
- Bluetooth 5.3 Technology: 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.
- Hands-Free Calling: Built-in microphone with Echo Cancellation and Noise Reduction (CVC) technology for clear calls.
- Music Playback: Supports music streaming via Bluetooth and playback from USB flash drives (MP3 format).
- Battery Voltage Detection: Displays car battery voltage upon power-on and provides low voltage warnings.
- Wide Compatibility: Compatible with all Bluetooth-enabled devices and various car models (12V-24V).
- Multi-Safety Protection: Features over-current, over-voltage, intelligent temperature control, and short-circuit protection.
7. Troubleshooting
If you encounter issues with your IMDEN C57 FM Transmitter, please refer to the following common solutions:
| Problem | Possible Cause / Solution |
|---|---|
| No power / Device not turning on | Ensure the device is securely plugged into the car's cigarette lighter socket. Check if the car's power outlet is functional. |
| Static or poor audio quality | 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 not connecting | 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. |
| Hands-free call quality is poor | Ensure the microphone is not obstructed. Reduce background noise in the car. Adjust the volume on your car stereo. |
| USB drive music not playing | Ensure the USB drive is formatted correctly and contains supported audio files (MP3). Insert the USB drive into the correct port (the one not labeled QC3.0). |
8. Specifications
- Model: C57
- Product Dimensions: 1.9 x 2.9 x 4.4 inches
- Item Weight: 2.82 ounces
- Connectivity Technology: Bluetooth, USB
- Bluetooth Version: 5.3 (as per product title)
- Power Source: Corded Electric (Car cigarette lighter)
- Material: Plastic
- Special Features: Bluetooth FM transmitter for car, Built-In Microphone, Fast Charging (QC3.0), Multi-Safety Protection
- Manufacturer: IMDEN
9. Warranty and Support
For warranty information or technical support, please refer to the contact details provided with your purchase documentation or visit the official IMDEN website. Keep your purchase receipt for warranty claims.
