Casio WU-BT10 USB Wireless Bluetooth Adapter for CT-S1, CT-S400, CT-410, LK-S450
The WU-BT10 Bluetooth MIDI and Audio adapter connects to your keyboard's USB type A port, and can send and receive MIDI data to and from other Bluetooth MIDI-compatible gear. It also receives and plays Bluetooth audio using your keyboard's built-in speaker system. The WU-BT10 is powered by the host keyboard's USB port, and does not require additional batteries or a separate AC adapter.
The WU-BT10 is compatible with the following models: CT-S1, CT-S400, CT-410, LK-S450.