Add Bluetooth to a Bose Series I SoundDock : 8 Steps (with Pictures) - Instructables
Amazon.com: Bose SoundDock Series II 30-Pin iPod/iPhone Speaker Dock (Black) : Electronics
Retro Review: Bose SoundDock Series I [iPhone+iPod Speaker] - YouTube
Resurrection of a Bose SoundDock iPod dock
Amazon.com: Bose SoundDock Portable 30-Pin iPod/iPhone Speaker Dock : Electronics
Docklinq Pro Bluetooth 5.0 A2dp Adapter Receiver For Bose Sounddock And 30 Pin Ipod Iphone Music Docking Station - Cables, Adapters & Sockets - AliExpress