FM Transmitter Car Modulator King K-BT36 for MP3 Playback 12V

The King K-BT36 FM Transmitter Car Modulator is a compact in-car audio adapter that streams MP3 playback from connected devices to a vehicle radio using an FM carrier. Designed for 12V vehicle systems, this transmitter connects to portable MP3 players, smartphones or other audio sources and broadcasts the signal on a selectable FM frequency so the factory car stereo can receive and play the audio without physical line-in modifications.

Advantages

This FM transmitter provides wireless MP3 audio transmission to the car radio, removing the need to replace or modify the factory head unit. Its 12V compatibility makes it suitable for most passenger vehicles. The device supports straightforward connection of external audio sources and offers selectable FM frequencies to minimize interference with local radio stations. The compact form factor allows discreet placement in the vehicle while preserving dashboard space and usability.

Suitable for

• Streaming MP3 music from portable players to a car radio
• Playing audio from smartphones or tablets through a vehicle’s FM stereo
• Temporary in-car audio upgrades without replacing the factory head unit
• Passengers who need simple wireless audio playback while driving

Key specifications

• Power input: compatible with 12V vehicle electrical systems
• Audio source: MP3 playback from connected external devices
• Transmission method: FM radio frequency modulation for car stereo reception
• Frequency selection: selectable FM channels to avoid local station interference
• Form factor: compact transmitter intended for in-vehicle placement

How to use

Connect the transmitter to the vehicle power outlet compatible with 12V systems, then link your MP3 player or smartphone to the unit according to the product’s connection method. Select an FM frequency on the transmitter that is free or weakly occupied in your area, tune the car radio to the same frequency, and start playback on your device. Adjust the transmitter and car radio volume levels to achieve clear audio. Turn off the transmitter and disconnect devices when not in use to prevent unnecessary power consumption.

Usage recommendations

For best audio quality, choose an FM frequency with minimal local radio interference and place the transmitter where it has unobstructed line of sight to the vehicle antenna. Keep device firmware and MP3 source apps up to date, and avoid high-volume distortion by balancing source and car stereo levels.