1. Introducció
This manual provides detailed instructions for the safe and efficient operation of your Caliber PMT302 FM Transmitter and MP3/WMA Player. The PMT302 allows you to play MP3 or WMA music files from a USB flash drive or SD card and broadcast them to your car's FM stereo. It also features an AUX input for connecting external audio devices.
2. Informació de seguretat
Instruccions importants de seguretat:
- Avoid using the device near other wireless devices to prevent interference.
- Keep the device and any associated batteries away from extreme temperatures and high humidity.
- Always eject memory cards safely before removing them from the device to prevent data loss.
- Dispose of batteries and electronic waste according to local regulations.
- No intenteu desmuntar ni modificar el dispositiu. Encarregueu tot el manteniment a personal qualificat.
3. Producte acabatview
The Caliber PMT302 is a versatile FM transmitter designed for in-car audio playback. It features a compact design and an intuitive interface.

Figure 1: Caliber PMT302 FM Transmitter with accessories. This image displays the main transmitter unit, the remote control, a 3.5mm AUX cable, and a spare fuse.
3.1 Característiques de la unitat principal
- Pantalla LCD digital: Shows frequency, track information, and volume.
- Port USB: For connecting USB flash drives (up to 32 GB).
- Ranura per a targeta SD: For inserting SD cards (up to 32 GB).
- Entrada AUX de 3.5 mm: For connecting external audio devices like smartphones or MP3 players.
- Botons de control: For frequency adjustment, track navigation, volume control, and playback modes.
- Font d'alimentació: Plugs into a 12V car cigarette lighter socket.
3.2 Control remot
The included remote control provides convenient access to various functions of the PMT302 from a distance.

Figure 2: Remote control for the Caliber PMT302. This image shows the layout of buttons on the remote, including channel selection, volume, track navigation, folder navigation, and EQ settings.
- CH-/CH+: Adjust FM frequency.
- VOL-/VOL+: Ajustar el volum.
- Pista anterior/següent: Navigate through music files.
- Reproduir/pausa: Controla la reproducció de música.
- Carpeta-/Carpeta+: Navigate through folders on USB/SD card.
- EQ: Seleccioneu els valors predefinits de l'equalitzador.
- Teclat numèric: Selecció directa de pista.
4. Configuració
- Insert into Car Power Outlet: Plug the PMT302 into your vehicle's 12V cigarette lighter socket. The device will power on automatically.
- Prepare Music Files:
- For USB: Load MP3 or WMA files onto a USB flash drive (up to 32 GB).
- For SD Card: Load MP3 or WMA files onto an SD card (up to 32 GB).
- Insereix un dispositiu d'emmagatzematge: Insert the prepared USB flash drive into the USB port or the SD card into the SD card slot on the PMT302. The device will automatically detect and begin playing music.
- Connect External Audio (Optional): If using an external device (e.g., smartphone), connect it to the PMT302's 3.5mm AUX input using the provided AUX cable.
5. Instruccions de funcionament
5.1 Setting the FM Frequency
- Turn on your car's FM radio.
- Tune your car radio to an unused FM frequency (one with static or no broadcast).
- On the PMT302, use the "CH-" or "CH+" buttons (on the device or remote) to match the FM frequency displayed on the PMT302's LCD screen to the frequency set on your car radio.
- Adjust the frequency until the music from the PMT302 is clearly heard through your car speakers.
Note: The PMT302 supports 206 FM channels from 87.5 MHz to 108 MHz. For best audio quality, select a frequency that is clear of strong radio stations.
5.2 Playing Music from USB/SD Card
- Once a USB drive or SD card is inserted, the device will automatically start playing MP3/WMA files.
- Use the Previous/Next Track buttons to skip between songs.
- Use the Play/Pause button to control playback.
- Adjust volume using the VOL-/VOL+ buttons on the device or remote.
- The device has a memory feature that saves the last played frequency, song, and volume settings.
5.3 Loop Playback Modes
The PMT302 offers four loop playback modes:
- Aleatori: Reprodueix cançons en ordre aleatori.
- Repetiu la carpeta: Repeats all songs within the current folder.
- Repetiu-ho tot: Repeats all songs on the storage device.
- Repeteix un: Repeteix la cançó actual.
Refer to the device's on-screen menu or remote control for selecting these modes.
5.4 Ús de l'entrada AUX
To play music from an external device:
- Connect your external audio device (e.g., smartphone, MP3 player) to the PMT302's 3.5mm AUX input using the provided cable.
- Ensure the external device is playing audio.
- The PMT302 will automatically switch to AUX input mode or may require manual selection via a mode button (if available).
- Adjust the volume on both the PMT302 and your external device for optimal sound.
6. Manteniment
- Neteja: Feu servir un drap suau i sec per netejar el dispositiu. No utilitzeu netejadors líquids ni aerosols.
- Emmagatzematge: Quan no l'utilitzeu, emmagatzemeu el dispositiu en un lloc fresc i sec, lluny de la llum solar directa i de temperatures extremes.
- Substitució de fusibles: If the device stops working, check the fuse located in the tip of the car charger plug. Replace it with a fuse of the same type and rating (a spare fuse is often included).
- Memory Card/USB Care: Handle SD cards and USB drives carefully. Avoid bending or exposing them to moisture.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Sense energia al dispositiu. | Car power outlet is not working, or fuse is blown. | Check if the car power outlet is active. Replace the fuse in the PMT302's plug if necessary. |
| Mala qualitat de so/estàtica. | FM frequency interference, low volume, or weak signal. | Tune to a different, clear FM frequency on both the PMT302 and your car radio. Increase volume on both devices. Ensure no other strong radio signals are on the chosen frequency. |
| Music not playing from USB/SD card. | Incorrecte file format, corrupted files, or card/drive not inserted correctly. | Assegureu-vos files are MP3 or WMA format. Reinsert the USB drive/SD card. Try a different USB drive/SD card. |
| El comandament a distància no funciona. | Battery depleted or line of sight blocked. | Replace the remote control battery. Ensure there is a clear path between the remote and the PMT302. |
| LCD display is dim or not working correctly. | Mal funcionament del dispositiu. | This may indicate a hardware issue. If within warranty, contact customer support. |
8. Especificacions
- Model: PMT302
- Formats d'àudio compatibles: MP3, WMA
- Rang de freqüència de FM: 87.5 - 108 MHz (206 channels)
- Suport d'emmagatzematge: USB Flash Drive (up to 32 GB), SD Card (up to 32 GB)
- Connectivitat: Auxiliary (3.5mm), USB 1.1
- Visualització: LCD
- Font d'alimentació: 12V DC Car Cigarette Lighter
- Pes de l'article: 78 grams
- Mètode de control: Touch (on device), Remote Control
- Color: Negre
9. Garantia i Suport
This Caliber PMT302 FM Transmitter comes with a 15-day exchange warranty des de la data de compra. Si us plau, conserveu el comprovant de compra per a reclamacions de garantia.
For technical support or warranty inquiries, please contact your retailer or the manufacturer, Sondpex Corporation of America.





