B&W Bowers and Wilkins CM4 Floor-Standing Loud Speakers -Pair -(Pick Up Only) | eBay
Waveshare Nano Base Board (B) for Raspberry Pi Compute Module 4 Same Size as CM4 Standard CM4 Socket 40PIN GPIO Gigabit Ethernet USB2.0 DSI CSI 3.5mm Audio Jack : Amazon.nl: Elektronica
Bowers & Wilkins B&W CM4 - Pair - Floor Standing Speakers - Tested and Working | Reverb