Wireless NFC Bluetooth 5.3 Transmitter Receiver Audio HiFi Music Adapter AUX.RCA. Supports NFC near-field pairing, with NFC automatically turning on or off Bluetooth wireless connection during pairing.
eBay
2.4G Head-mounted Microphone Wireless Lavalier Microphone Set with Receiver for Amplifier Voice Speaker Teaching Tour Guide
Aliexpress UK
Supports NFC near-field pairing, with NFC automatically turning on or off Bluetooth wireless connection during pairing. Wireless Audio Receiver Bluetooth 5.1 3.5mm AUX NFC to 2RCA Jack Stereo Adapter.
eBay
JOYO MW-1 5.8GHz Wireless Microphone System XLR Mic Converter Wireless Microphone Transmitter Receiver for Live Interview/Studio
Aliexpress UK
Bluetooth Version: Bluetooth 5.0 + EDR. RCA Male Plug to Bare Wire Cable For CD DVD Player Tuner Amplifier Audio Speaker. Easy to upgrade your old style speaker, amplifier, TV or car stereo system to Bluetooth hands-free wireless audio!
eBay
KDES U2 48V/0V UHF Wireless Microphone Converter XLR Transmitter and Receiver Microphone Wireless System for All Kind Microphone
Aliexpress UK
B6 BT Transmitter is specially designed for the Audio Devices (such as MP3, MP4, TV and PC, etc.) without BT function. You can connect the BT Transmitter to the audio devices via the included 3.5mm Audio Plug, changing these audio devices into BT-enabled audio devices, and making it work with BT-enabled Headset and Speaker.
eBay
2.4G Head-mounted Wireless Lavalier Microphone Set Transmitter with Receiver for Amplifier Voice Speaker Teaching Tour Guide
Aliexpress UK
Output: 30pin output. Insert the product directly into the 30PIN plug slot of the speaker, and the speaker display "";. Compatible with all Bluetooth-compatible devices that support wireless music transfer(A2DP).
eBay
Car Sun Visor Speaker Bluetooth Car Kit Handsfree Call Wireless Speakerphone For Phone Auto Bluetooth Audio Receiver Accessories
Aliexpress UK
Support A2DP, AVRCP AVDTP, HFP & HSP. (high sound quality is good, but the delay, 0.5 seconds, suitable for listening to music). The USB bluetooth music receiver no extension, no pull wire, more do not need to be 3.5 mm headset line to speak to the output.
eBay
Wireless Microphone Converter XLR Transmitter and Receiver Microphone Wireless System for Dynamic Microphone Wired to wireless
Aliexpress UK
Supports NFC near-field pairing, with NFC automatically turning on or off Bluetooth wireless connection during pairing. Output interface: 3.5mm stereo RCA left and right channels. When you see the blue indicator light flashing in the "indicator window" and hear a beep, it indicates that the NFC desktop Bluetooth audio receiver has successfully entered pairing standby mode.
eBay
SOUNDCHEKS H-58 2.4GHz Wireless Microphone System XLR Mic Adapter Dynamic Mic Wireless Transmitter and Receiver
Aliexpress UK
Support: A2DP V1.2. Wireless Play: Removing troubles of wired connection,through the wireless connection and transmission. 1 x Adapter. After matching success, you can use your phone to play music.
eBay
M-VAVE WP-7 2.4G Wireless Microphone System On XLR Mic Adapter Wireless Dynamic Microphone Transmitter Receiver
Aliexpress UK