Amazon.com: USB Bluetooth Adapter for PC (Silver) - Bluetooth Dongle for PC Windows 10/8/7 - PC to Bluetooth Adapter - Bluetooth USB Receiver 4.0 for Computer/Laptop
Alpha Audio NETSynology DSM 7 no longer supports USB dacs
Baseus USB Bluetooth Adapter : r/synology
Plugable USB 2.0 Bluetooth® Adapter – Plugable Technologies