FM transmitter No name LTC M31 — car FM transmitter for audio streaming via 3.5mm or USB

The No name LTC M31 FM transmitter is a compact car accessory that enables audio streaming from mobile devices to a vehicle radio via adjustable FM transmission. It supports connection through a 3.5 mm AUX input and a USB port for charging and, where supported by the device, USB audio playback. The unit provides basic controls for selecting tracks, adjusting volume, and tuning the transmission frequency to match the car radio. Designed for vehicles without built-in Bluetooth audio, the transmitter offers a simple way to play music and handle calls through the car’s speaker system.

Advantages

The transmitter offers an easy-to-install solution for wireless audio playback without altering the car’s existing audio system. Its 3.5 mm input ensures compatibility with a wide range of phones and portable players, while the USB port supplies power for charging during use. The adjustable FM frequency allows users to find a clear channel for minimal interference, and on-device controls help manage audio playback and call handling without needing to access the phone directly.

Suitable for

• Cars without integrated Bluetooth audio
• Playing music from smartphones, MP3 players, or tablets via 3.5 mm output
• Charging mobile devices while streaming audio
• Hands-free listening of calls through the car radio

Key specifications

• Input: 3.5 mm auxiliary audio connection
• Power/connection: USB port for device charging and USB audio support where applicable
• Transmission: Adjustable FM frequency for pairing with car radio
• Controls: On-device buttons for track selection, volume adjustment and frequency tuning
• Form factor: Compact plug-in transmitter designed for vehicle use

How to use

Plug the LTC M31 into the vehicle power outlet or USB port as required, connect your mobile device using a 3.5 mm cable or via USB if your device supports USB audio, and then tune the transmitter to an unused FM frequency. Set the car radio to the same FM frequency to start audio playback. Use the transmitter’s controls to adjust volume, change tracks, or answer calls. If charging is needed, connect the device to the transmitter’s USB port while streaming.

Usage recommendations

Choose an FM frequency with minimal local radio stations to reduce interference and place the transmitter where it does not obstruct vehicle controls. For improved call quality, ensure the mobile device has a stable signal and keep the phone positioned according to the vehicle’s hands-free guidelines.