We would like to clarify that the item is in brand new condition . Our music store had to close down due to the sale of our building, and we are now selling off our remaining inventory. This item has never been opened.

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.

Casio WU-BT10 Wireless Bluetooth MIDI Adapter Features:
Bluetooth MIDI controller for compatible Casio keyboards that allows wireless control of external sound engines
Control external hardware from your arranger
Audio playback enables easy audio streaming from a smart device
Compatible with: CT-S400, CT-S1, LK-S450