27.KB Keyboard. Acoustic Solutions MK-4100A. 49 Keys. This pink keyboard will delight any young girl. It has 10 rhythms, 16 voices, single finger chords, and 8 percussion sounds. It has 6 demo tunes. It is complete with power supply, music stand and instruction manual. There is a headphone socket and a socket for a microphone. This instrument appears as new and is in its original box. It is priced to sell at £20.