(A) Took shape design; Pen-shaped metal design bring convenience. (B)The long-time recording time up to 280 hours. (C) MP3 music play. (D)Support multiple audio formats. (E) Not needed drive above WIN 2000. (F ) USB data transmission . (G)Capacity: 128MB/256MB/512MB/1GB . (H) Use 1pcs AAA battery .