Radio only, no mic.
eBay
Q7 Car Bluetooth FM Transmitter - Dual USB PD Charging, Hands-Free Calling & Mp3 (3.1A)
Aliexpress UK
Wireless: AV extender through wireless transmission to form a local area sharing signal, to achieve conference room, classroom AV signal wireless transmission. Realize the living room, bedroom together to watch the program.
eBay
Dab Radio Receiver in Car with Screen Stereo Sound Digital Signal Antenna Broadcast Adapter Dab+ Bluetooth Mp3 Fm Transmitter
Aliexpress UK
The circuit is simple. It is only composed of common triodes and resistance-capacitance inductive components, without audio, which is easy to make; The sound quality is good.
eBay
FM12B 1.44 Inch LCD Bluetooth Car MP3 Player Handsfree Wireless FM Transmitter Radio Adapter USB Car Charger Remote Control
Aliexpress UK
Supports Bluetooth Audio Playback and Bluetooth Hands-Free Calls. - Accurate Structural Design. Support Power and Storage Functions. - Support Bluetooth/TF card/USB Player and Bluetooth Hands-Free Communication.
eBay
Car Bluetooth 5.1 FM01 Transmitter Receiver Handsfree Call Mini USB Power Car Kit Auto Wireless Audio For Car Fm Radio
Aliexpress UK
eBay
Dual USB Handsfree Wireless Bluetooth Car FM Transmitter Auto Radio MP3 Player USB 2.1A Car Charger Phone Charger
Aliexpress UK
Fully tested and working as it should as shown in video. No batteries or servos supplied.
eBay
Car Charge Bluetooth 5.3 FM Transmitter Handsfree Car Radio Modulator MP3 Player With PD30W Super Quick Charge Adapter for Car
Aliexpress UK
Transmitter Frequency: 530-1600kHz (AM radio band). Disassembled Parts: Includes pre-assembled components on the mainboard and audio cables. Frequency tuning is required. Filter Network: Low-pass network filters out high-order harmonics and achieves a sinusoidal waveform.
eBay
Bluetooth 5.1 Car FM Transmitter Car MP3 Stereo Music Player Handsfree 3.5mm Aux Wireless Car Kit 30W PD USB-C Fast Charger
Aliexpress UK
1948 Machlett ML-357B Transmitting Tube NOS – Raytheon / WHOM-AM Ridgefield Park NJ – NIB. Machlett ML-357B High-Power Transmitting Vacuum Tube. Manufacturer:Machlett Laboratories (distributed by Raytheon).
eBay
Car Bluetooth 5.0 FM Transmitter PD Type-C Dual USB 3.1A Fast Charger 7 Color Ambient Lightt Car MP3 Player Handsfree Kit
Aliexpress UK