Make the old speaker device work like a Bluetooth device. The transmitter mode is suitable for: TV/computer/projector/amplifier/TV box/Bluetooth earphones/headphones/Bluetooth speakers, etc. DAC converter, supporting signal conversion from digital optical coaxial audio to RCA 3.5mm or R/Analog audio.
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Portable FM AM SW Radio Solar Charging Hand Crank Emergency Radios Wireless Bluetooth Speaker with LED Flashlight TF Card USB Po
Aliexpress UK
Wireless Bluetooth5.2 Receiver 3.5mm Jack AUX to 2 RCA Audio Stereo Adapter NFC. Bluetooth Receiver Audio Stereo Wireless 3.5mm Jack AUX NFC to 2 RCA Adapter UK. Wireless Bluetooth Receiver Audio Stereo 3.5mm Jack AUX NFC to 2 RCA Adapter UK .
eBay
MK-321 Portable Bluetooth Speaker 20W Bass Soundbox With Strap USB/TF/FM Outdoor Camping Audio
Aliexpress UK
Title: ASUS USB-BT540 Bluetooth 5.4 USB Dongle Adapter, Supports up to 7 Devices, Ultra Compact Design, Compatible with Windows 8.1, 10 and 11 and Bluetooth 2.1, 3 and 4, Black. Latest Bluetooth 5.4 with Bluetooth Low Energy (BLE) for energy-saving wireless connectivity.
eBay
DC 12V Bluetooth 5.0 MP3 WMA WAV APE Decoder Board Hands-free Car Audio Microphone USB TF FM Radio Mp3 Music Player Speaker
Aliexpress UK
Plug & Play, it can help power your Echo Spot with a power bank or USB hub. Right angle head, 4.0mm x 1.7mm plug. Convenient to use and carry. Long service life. Light in weight.
eBay
New Classical Retro FM AM Desktop Radio Receiver Rechargeable Portable MP3 Radios Stereo 3W Bluetooth Speaker AUX USB
Aliexpress UK
Upgrade your driving experience with the2-in-1 Wireless CarPlay Adapter. Designed to convert your factory-wired CarPlay system into a fully wireless setup, this compact device makes every ride more convenient.
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ESSGOO Car radio Universal CD DVD Player MP3 USB Bluetooth 4.0 hands-free SD TF Aux-In FM Single 1DIN with DAB+ In-Dash FM Radio
Aliexpress UK
4/8/12pcs Luminous Tire Valve Cap Car Wheels Dust Cover Glow In The Dark. Application: With this Bluetooth Audio Receiver, you can enjoy CD-Like music from your smartphone or other Bluetooth devices via the Mini Bluetooth receiver.
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X1 Wireless Bluetooth 5.0 Speaker Home Mini Audio Portable Outdoor Speaker USB Rechargeable HIFI Speaker Player Gift Giving
Aliexpress UK
Bluetooth 5.1 Audio Smart Receiver Wireless 3.5mm AUX NFC to 2RCA Stereo Adapter
eBay
Car Radio 1Din Car MP3 Bluetooth player Universal Digital Stereo Multimedia FM Audio Music USB AUX input TF Card In Dash Kit
Aliexpress UK
Isolation module inside and powerful copper wire effectively prevent electromagnetic interference, so you can enjoy clean Bluetooth stereo sound. 1x Bluetooth 5.0 receiver adapter 3.5mm jack car AUX.
eBay
Retro Cassette Boombox AM/FM/SW1-2 Radios with Bluetooth/USB/TF Play Function Vintage Boom Box with Tape Recording AC DC Power
Aliexpress UK