I bought this about three years ago. I've used it about once every two or three months. I took good care of it, but I accidentally washed it in the washing machine after putting it in a pocket of my clothes. Since then, it still works, but after using it for about an hour, an English announcement of 1-2 seconds plays, and then the same announcement comes on about every 15 minutes. The announcement sounds like "Low battery." The music stops when the message plays, and then starts again. If you don't mind this, or if the charging function of the main unit is not a problem...