They will work wired by USB or via the provided Bluetooth adapter, but no option for a legacy 3.5mm audio jack connection was included. Unless you use phones with audio jacks, there is only one ...

The Avantree Relay Premium Bluetooth 5.3 Adapter lets you connect your wireless Bluetooth headphones through any single or dual-pin 3.5-millimeter headphone jack with a simple device that can fit in ...

this Bluetooth adapter can turn your old non-Bluetooth device into a wireless one. One key to power on and enter pairing mode. Easy to switch between transmitter (TX) and receiver (RX) modes.

Bluetooth 5.0 for Faster, Further Coverage- Transfer data up to twice as fast as before, and with 4X the range in BLE Wireless Connection, free of limitation - Enables wireless communication with ...

For very extensive Bluetooth related functionality, wrappers and documentation: 32feet. (A clone of the '32feet' library is here) For very good PBAP and MAP support: MyPhone.