The Audiovox SMT5600 comes with 28.5mb of internal flash memory which can hold up to 6 songs. Consumers can purchase miniSD memory chips for additional song storage in either 128mb or 256mb varieties, which can hold approximately two and four hours of songs respectively. MiniSD chips are currently widely available for under $25 each.
miniSDカード挿せば (スコア:3, 参考になる)
プレスリリース [yahoo.com]より。
GSM/GPRS対応らしいので1曲3MB落とすのにベストコンディションで3分ぐらいですかね...。