Use Raspberry Pi as a Bluetooth & AirPlay receiver
Bluetooth Audio Receiver and Playback Module - DFRobot
Portable Raspberry Pi Bluetooth Receiver/Player : 7 Steps (with Pictures) - Instructables
Turn Your Raspberry Pi Into a Wireless Portable Bluetooth Audio System A2DP : 8 Steps - Instructables
Amazon.com: 1Mii B06TX Bluetooth 5.2 Transmitter for TV to Wireless Headphone/Speaker, Bluetooth Adapter for TV w/Volume Control, AUX/RCA/Optical/Coaxial Audio Inputs, Plug n Play, aptX Low Latency & HD : Electronics
Bluetooth 5.0 Adapter Audio Receiver 2 in 1 USB Transmitter Digital Devices Wireless Transfer for Stereo Headphones Laptop Windows 10, 8.1, 8, 7, Raspberry Pi, Linux Compatible - Walmart.com
Use Raspberry Pi as a Bluetooth & AirPlay receiver
Pluga-Project - Raspberry Pi Bluetooth Audio Receiver - Plugable Knowledge Base
Bluetooth Audio Receiver Board(Apt-X)
Turn your old speakers or Hi-Fi into Bluetooth, Airplay and Spotify receivers with a Raspberry Pi and this step-by-step guide
Skylark-BT5.0DAC – InnoMaker English|USB TO CAN Analyzer|Raspberry Pi Solutions|Industrial Camera
Building a Bluetooth DAC with Raspberry Pi Zero W – Page Fault Blog
Bluetooth Audio Receiver Board(Apt-X)
Turn your old speakers or Hi-Fi into Bluetooth, Airplay and Spotify receivers with a Raspberry Pi and this step-by-step guide