Casio keyboard with adapter in great condition. I've seen used models on Amazon for approx £150 so this is a bargain.
Casio Archive provides the following description for the CTK-481 model:
5-Octave Full-Size Keyboard with LCD, Song Bank and Midi
•61 Full Size Keys
•100 Rhythm Patterns
•Casio/Fingered Chord auto-accompaniment system
•100 Demo Songs
•LCD Window (76x42mm) display selections and status of Tone, Rhythm, Song, Volume, Melody Off and Tempo.
•On-screen Keyboard, music staff and finger icons display notes and chords
•Chord Book Function gives notes and fingerings for 15 different chord types in every key.
•Transpose and Tuning Control
•MIDI IN/OUT Jack; 5-part multi-timbral
•2 Built-in Speakers; Lineout/headphone Jack
•Sustain Pedal Jack
•Operates on AA batteries or optional AD-5 AC Adapter