A Digital Recorder

Have you ever waited more than 2 years to buy something?
In my case, I waited about 4 years to buy one special thing, a digital recorder.
That is not the normal one. It can play the recorded voice with the speed from 0.3 till 4 times faster. I recorded some English sentences with my voice, and often hear them between 2.5 ~3.4 . When I thought the speed is too fast, then I slow down it. But if I hear the same track so many times, gradually my ears get use to its speed, then I can catch up to the maximum - 4.0. I can save so much time if I review English words with faster speed and also I can remember well if I repeat them many times within a second.
I'm really grad to have this.