LENCENT T25 Bluetooth FM Transmitter

Introduction

The LENCENT T25 Bluetooth FM Transmitter is designed to enhance your in-car audio experience by allowing you to stream music, make hands-free calls, and charge your devices. Featuring Bluetooth 5.0, dual USB charging ports, and car battery voltage detection, the T25 provides a smarter, safer, and more enjoyable driving journey.

Package Contents

• 1x LENCENT T25 FM Transmitter
• 1x User Manual

Specifications

Note: The product features two USB ports, one for 5V/2.4A fast charging and another for 5V/1A charging/USB disk playback.

Diagram showing the dimensions and button functions of the LENCENT T25.

Setup Instructions

1. Plug In: Insert the FM transmitter into your car's cigarette lighter socket. The device will power on and display the current FM frequency.
2. Tune FM Radio: Tune your car's FM radio to a blank, unused frequency (e.g., 91.2 MHz). Avoid frequencies with strong radio signals to minimize interference.
3. Match Frequencies: Long press the 'CH' button on the FM transmitter until the frequency display flashes. Then, rotate the multifunction button (MFB) to adjust the transmitter's frequency to match the blank frequency on your car radio.
4. Bluetooth Pairing: On your smartphone, enable Bluetooth and search for available devices. Select "T25" from the list to pair. Once paired, the device will confirm the connection.

For a visual guide, please refer to the setup video below:

Visual representation of the FM tuning and Bluetooth pairing process.

Operating Instructions

Music Playback

The LENCENT T25 supports three methods for music playback:

• Bluetooth: Once paired with your phone, music will stream wirelessly to your car stereo.
• USB Flash Drive: Insert a USB flash drive (up to 32GB) containing MP3, WMA, WAV, or FLAC audio files into the designated USB port (5V/1A port). The device will automatically detect and play music.
• MicroSD Card: Insert a microSD card (up to 32GB) with supported audio files into the TF card slot. Music will play automatically.

Illustration of the three music playback modes.

Hands-Free Calling

When your phone is connected via Bluetooth, you can manage calls directly through the FM transmitter:

• Answer/End Call: Press the multifunction button (MFB) once.
• Reject Call: Long press the MFB.
• Redial Last Number: Double-press the MFB.

The built-in high-sensitive microphone and CVC (Clear Voice Capture) noise cancellation technology ensure clear communication.

Demonstration of hands-free calling functionality.

Volume Control

Rotate the multifunction button (MFB) clockwise to increase volume and counter-clockwise to decrease volume. This controls the output volume of the transmitter, which then goes to your car stereo.

Charging Devices

The T25 features dual USB charging ports:

• One 5V/2.4A port for fast charging.
• One 5V/1A port for standard charging or USB disk playback.

These ports are equipped with over-current, over-voltage, intelligent temperature control, and short circuit protection to ensure safe charging.

Image illustrating the dual USB charging capability.

Car Battery Voltage Detection

Upon plugging in, the FM transmitter will display your car's battery voltage. This helps you monitor the health of your car battery:

• Normal (Car On/Moving): 13.2V to 14.7V
• Normal (Car Parked/Ignition Off): 12.2V to 12.8V

Visual of the voltage detection feature.

Navigation Broadcast

When connected via Bluetooth, the T25 can broadcast clear voice navigation prompts from your phone's app through your car speakers. The device will automatically adjust music volume for navigation prompts, ensuring you don't miss directions.

Image demonstrating navigation broadcast functionality.

Maintenance

• Keep the device dry. Moisture can damage the internal circuit.
• Do not drop, knock, or shake the device. Rough handling can break internal circuit boards.
• Do not use harsh chemicals or strong detergents to clean the device. Use a soft, dry cloth.
• Avoid extreme temperatures. High temperatures can shorten the life of electronic devices, damage batteries, and warp or melt plastic parts.

Troubleshooting

• No Power: Ensure the FM transmitter is securely plugged into the cigarette lighter socket and your car's ignition is on (if required for the socket). Check your car's fuse box for any blown fuses related to the cigarette lighter.
• Static/Poor Audio Quality: Make sure your car's FM radio and the transmitter are tuned to the exact same blank frequency. Try different blank frequencies to find one with less interference. Ensure your phone's volume is turned up.
• Bluetooth Not Connecting: Ensure Bluetooth is enabled on your phone and the transmitter is powered on. Forget "T25" from your phone's Bluetooth settings and try pairing again. Move closer to the device if you are too far.
• Charging Not Working: Check if the USB cable is properly connected to both the transmitter and your device. Ensure your device is compatible with the charging output. Try a different USB cable or device to isolate the issue.
• Hands-Free Call Quality is Poor: Ensure the microphone is not obstructed. Reduce background noise in the car. Check your phone's call volume settings.

User Tips

• Always choose a completely unused FM frequency for the best audio quality. Scan through the FM band to find a clear channel.
• For optimal charging speed, use the 5V/2.4A port for devices that support faster charging.
• Keep your music files organized on your USB drive or microSD card for easier navigation.
• Regularly check the car battery voltage display to monitor your vehicle's electrical health.

Warranty and Support

LENCENT products are designed for reliability and performance. For any issues or questions regarding your T25 Bluetooth FM Transmitter, please contact LENCENT customer support. Keep your purchase receipt as proof of purchase for warranty claims.