Did you ever want to play with the CD but it was just too fast?  This CD player can change the speed of the music without changing the pitch!  What a great practice tool!  It can also change the pitch if the CD is slightly different from your harp.  Many other features like a built in metronome and tuner are also included.   You will need headphones or speakers to use it.  Powered with AC adaptor or batteries.  Search on line for:  Tascam CD-VT2.