Stereo Digital FM Transmitter Circuit - Technology - PCBway
FM Transmitter Module, 868MHz, SMT Slim Package - Radio Modules from RF Solutions UK
MAX2606 Mini FM Transmitter
Jopwkuin Bluetooth Car Adapter, Ambient Light Hands Free Intelligent Identification Chip Bluetooth FM Transmitter 12V-24V for Cell Phone(#1): Amazon.co.uk: Electronics & Photo
FM Transmitter Circuits: How to Build One Tailored For You