1. Introduction
This user manual provides detailed instructions for the Nulaxy Bluetooth 5.0 FM Transmitter (Model NX12). This device allows you to stream audio from your Bluetooth-enabled devices to your car's FM radio, make hands-free calls, and charge multiple devices simultaneously. Please read this manual thoroughly before using the product to ensure proper operation and safety.
2. Safety Information
For safe and optimal use of your Nulaxy Bluetooth FM Transmitter, please observe the following safety guidelines:
- Ensure the product is used responsibly and in accordance with the manufacturer's instructions.
- Avoid potential interference with other wireless devices by maintaining a reasonable distance.
- Follow all battery handling and charging precautions, especially when utilizing the quick charging ports.
- Handle the device with care to prevent damage.
- Do not attempt to disassemble or modify the device. This may void the warranty and pose safety risks.
- Keep the device away from extreme temperatures, direct sunlight, and moisture.
- Ensure proper ventilation when charging devices to prevent overheating.
- Always ensure the device is securely plugged into the car's cigarette lighter socket to prevent dislodgement during driving.
3. Product Overview and Features
The Nulaxy NX12 FM Transmitter is designed to enhance your in-car audio and charging experience. Key features include:
- Fast Charging & 3 USB Ports: Equipped with PD18W and QC3.0 quick charging ports, plus a conventional USB port, for efficient charging of multiple devices.
- Hi-Fi Deep Bass & Music Player: Supports audio streaming from Bluetooth devices and plays MP3, WMA, WAV formats from a USB flash drive. Features a dedicated "b" button for bass enhancement.
- Bluetooth V5.0: Provides a stable and fast wireless connection for music, calls, and navigation.
- Hands-free Calls: Integrated Noise Suppression (CVC) technology ensures clear call quality. Features all-in-one buttons for answering, rejecting, hanging up, and recalling calls.
- Voice Assistant Support: Compatible with voice assistants like Siri and Google Assistant for convenient control.
- Broad Compatibility: Works with various Bluetooth devices and 12V-24V vehicles.
Figure 3.1: Front view of the Nulaxy NX12 Bluetooth FM Transmitter, showing the display, control knob, and USB ports.
4. Setup Instructions
- Insert into Car Cigarette Lighter: Plug the Nulaxy NX12 into your vehicle's 12V-24V cigarette lighter socket. The device will power on automatically, and the LED display will light up.
- Tune FM Frequency:
- Press the "CH" (Channel) button on the device. The frequency display will start blinking.
- Rotate the multi-function knob (phone button) to select an empty FM frequency. Choose a frequency that does not have any strong radio station signals to minimize interference.
- Once you have selected a frequency, press the "CH" button again or wait a few seconds for the frequency to set.
- Tune Car Radio: Tune your car's FM radio to the exact same frequency selected on the Nulaxy NX12.
- Pair Bluetooth:
- On your mobile device (smartphone, tablet, etc.), enable Bluetooth.
- Search for available Bluetooth devices and select "NX12" from the list.
- Once paired, the device will confirm the connection, and you are ready to stream audio.
Figure 4.1: Illustration of the Nulaxy NX12 connected to a car's power outlet, demonstrating Bluetooth and USB flash drive music playback.
5. Operating Instructions
5.1 Music Playback
- Bluetooth Streaming: After successful Bluetooth pairing, open your music player on your mobile device. Audio will be transmitted to your car's speakers via the selected FM frequency.
- USB Flash Drive Playback: Insert a USB flash drive (up to 64GB) containing MP3, WMA, or WAV audio files into the USB port. The device will automatically detect and play the music.
- Volume Control: Adjust the volume using the multi-function knob on the transmitter or your car's stereo volume control.
- Bass Booster: Press the "b" button to activate the bass booster effect for enhanced low frequencies. Press again to deactivate.
Figure 5.1: Close-up of the Nulaxy NX12 showing the "b" button for bass boosting.
5.2 Hands-Free Calling
- Answer Call: When an incoming call rings, press the multi-function knob (phone button) once to answer.
- Reject Call: Press and hold the multi-function knob for approximately 2 seconds to reject an incoming call.
- End Call: During a call, press the multi-function knob once to end the conversation.
- Redial Last Number: Double-press the multi-function knob to redial the last dialed number.
Figure 5.2: Nulaxy NX12 demonstrating hands-free call functionality with CVC noise cancellation.
5.3 Voice Assistant
The Nulaxy NX12 supports voice assistants such as Siri and Google Assistant. To activate:
- Press and hold the multi-function knob for approximately 2 seconds (when not on a call) to activate your phone's voice assistant.
- You can then use voice commands for navigation, making calls, or playing music.
Figure 5.3: Nulaxy NX12 interacting with a smartphone for voice assistant commands.
5.4 Charging Devices
The NX12 features three USB charging ports:
- PD 18W Port: For fast charging compatible USB-C devices.
- QC 3.0 Port: For fast charging compatible Quick Charge devices.
- Standard USB Port: For conventional charging of other USB devices.
Simply connect your device's charging cable to the appropriate port on the transmitter.
Figure 5.4: Nulaxy NX12 showing the PD 18W and QC3.0 charging ports in use.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use liquid cleaners or aerosols.
- Storage: When not in use for extended periods, store the device in a cool, dry place away from direct sunlight.
- Handling: Avoid dropping the device or subjecting it to strong impacts.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power/Device not turning on | Loose connection; Car cigarette lighter socket not working; Blown fuse in car. | Ensure the device is firmly plugged in. Check if the car's cigarette lighter socket is functional with another device. Consult a mechanic if the car's fuse is suspected. |
| Static or poor audio quality | FM frequency interference; Volume too low/high; Bluetooth connection issue. | Find a clearer, unused FM frequency. Adjust the volume on both the transmitter and car stereo. Re-pair the Bluetooth connection. Ensure your car's antenna is not interfering. |
| Bluetooth not connecting | Device not in pairing mode; Bluetooth disabled on phone; Interference. | Ensure "NX12" is selected in your phone's Bluetooth settings. Turn Bluetooth off and on again on your phone. Move closer to the device. |
| Calls are unclear/echoing | Microphone obstruction; Environmental noise; Volume settings. | Ensure the microphone on the device is not covered. Reduce background noise in the car. Adjust call volume. |
| Slow charging or no charging | Cable issue; Device not compatible with fast charging; Port malfunction. | Try a different charging cable. Ensure your device supports PD or QC3.0 for fast charging. Try a different USB port on the transmitter. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | NX12 |
| Bluetooth Version | 5.0 |
| Input Voltage | 12V-24V DC |
| USB-C Output | PD 18W (Max) |
| USB-A Output (QC3.0) | QC3.0 (4X faster than standard) |
| Additional USB Port | Standard USB (5V/1A) |
| Supported Audio Formats | MP3, WMA, WAV |
| FM Frequency Range | 87.5 - 108.0 MHz |
| Product Dimensions | 4.4 x 2.4 x 1.8 inches |
| Item Weight | 2.39 ounces |
| Material | Plastic |
| Special Features | Bluetooth 5.0, Fast Charging, Hands-Free Calls, Hi-Fi Music & Support, Multi-safety Protection, Bass Booster, Voice Assistant Compatibility |
9. Warranty and Support
Nulaxy products are designed for reliability and performance. For warranty information and customer support, please refer to the official Nulaxy website or contact their customer service directly. Keep your purchase receipt as proof of purchase.
For further assistance, you may visit the Nulaxy Store on Amazon.
