LENCENT Bluetooth 5.3 FM Transmitter Car Adapter

1. Introduction

Thank you for choosing the LENCENT Bluetooth 5.3 FM Transmitter Car Adapter. This device allows you to stream music from your Bluetooth-enabled devices to your car's FM stereo system, make hands-free calls, and fast charge your mobile devices simultaneously. Please read this manual carefully before use to ensure proper operation and to maximize your experience.

2. Package Contents

• LENCENT Bluetooth 5.3 FM Transmitter Car Adapter (Model: BT25)
• User Manual

3. Specifications

4. Product Overview

Familiarize yourself with the various parts and controls of your FM Transmitter.

• PD 20W Port: USB Type-C port for Power Delivery fast charging.
• QC3.0 Port: USB-A port for Quick Charge 3.0 fast charging and USB disk playback.
• FM Display: Shows the current FM frequency.
• Previous/Next Track Buttons: For music navigation.
• Multi-function Knob: Adjusts volume, changes FM frequency, and activates bass mode.
• Call Button: For answering, ending, rejecting calls, and activating voice assistant.
• FM Button: To enter FM frequency adjustment mode.
• Microphone: Built-in CVC noise-cancelling microphone for clear calls.
• LED Light Ring: Dynamic RGB lighting with multiple modes.

5. Setup Instructions

1. Insert the Transmitter: Plug the LENCENT BT25 FM Transmitter into your car's 12V-24V cigarette lighter socket.

2. Power On: The device will power on automatically and the LED display will light up, showing the current battery voltage for 3 seconds, then displaying the FM frequency.

3. Set FM Frequency:

   • Press the 'FM' button. The FM frequency on the display will start flashing.
   • Rotate the multi-function knob left or right to select an empty FM frequency (one with no radio station broadcasting) on your car radio.
   • Match the frequency on the FM Transmitter to the selected empty frequency on your car radio. Press the 'FM' button again or wait 3 seconds for the frequency to set.

4. Pair via Bluetooth:

   • The device will enter Bluetooth pairing mode automatically after power on. The Bluetooth indicator will flash.
   • On your smartphone, enable Bluetooth and search for available devices.
   • Select 'BT25' from the list to connect. Once connected, the Bluetooth indicator will stop flashing and remain solid.
   • You can now stream audio from your phone to your car stereo.

6. Operating Instructions

6.1 Music Playback

The BT25 supports music playback via Bluetooth or a USB flash drive.

• Bluetooth Streaming: Once paired, play music on your phone, and it will transmit to your car stereo via the set FM frequency.
• USB Disk Playback: Insert a USB flash drive (up to 64GB, formatted to FAT32) containing MP3, WMA, APE, FLAC, or WAV audio files into the QC3.0 USB port. The device will automatically detect and play music from the USB drive.
• Track Control: Use the Previous/Next Track buttons on the device to skip songs.
• Volume Adjustment: Rotate the multi-function knob to adjust the volume.
• Bass Boost: Press the multi-function knob (labeled 'b' in some diagrams) to activate the deep bass mode for enhanced audio. Press again to turn off.

6.2 Hands-Free Calling

The BT25 features a built-in CVC noise-cancelling microphone for clear hands-free calls.

• Answer Call: Press the Call button once.
• Hang Up Call: Press the Call button once during a call.
• Reject Call: Press and hold the Call button for 2 seconds.
• Redial Last Number: Double-press the Call button.

6.3 Fast Charging

The device is equipped with a PD 20W Type-C port and a QC3.0 USB-A port for rapid charging.

• Plug your compatible charging cable into either the PD 20W (Type-C) or QC3.0 (USB-A) port.
• Connect the other end to your mobile device for fast charging.
• Both ports can be used simultaneously.

6.4 LED Lighting Modes

The BT25 features a dynamic RGB LED light ring with 9 color options and modes.

• Press the dedicated LED light button (if available, or refer to product diagram for specific control) to cycle through the 9 colors: Red, Blue, Green, Yellow, Purple, Cyan, White, Rainbow, Rainbow Flow.
• You can also select an option to turn the lights off.

6.5 Voice Assistant Activation

Activate your smartphone's voice assistant directly from the BT25.

• Press and hold the Call button for 2 seconds (or as indicated by the product's specific button mapping) to activate Siri, Bixby, or Google Assistant on your connected smartphone.
• You can then issue voice commands through the transmitter's microphone.

7. Maintenance

• Keep the device dry. Moisture can damage electronic circuits.
• Do not attempt to disassemble the product. Unauthorized repairs will void the warranty.
• Clean the device with a soft, dry cloth. Do not use harsh chemicals or detergents.
• Avoid extreme temperatures, dust, and direct sunlight.

8. Troubleshooting

9. User Tips

• For the best audio experience, always try to find an FM frequency that is completely clear of any radio stations. This minimizes interference and static.
• When using the voice assistant, speak clearly and directly towards the transmitter for optimal recognition.
• If you frequently switch between Bluetooth and USB disk for music, remember that the device will prioritize the last active source or automatically switch when a USB disk is inserted.
• Experiment with the 9-color LED lighting modes to match your car's interior or your mood. You can also turn them off if preferred.

10. Warranty and Support

LENCENT products are designed and manufactured to the highest quality standards. For any issues or questions regarding your product, please contact LENCENT customer support. Keep your purchase receipt as proof of purchase for warranty claims.

For further assistance, please refer to the contact information provided on the LENCENT official website or your retailer's support channels.