Product Description 1) Capacity: 64MB, 128MB, 256MB, 512MB, 1G(optional) 2) Battery life: 8-10 hours with 1 x AAA 3) Can built in FM turner with FM radio(optional) 4) Music format: MP3, WMA 5) Recording format: AG8/36 hour (128m) 6) Music sampling rate: 32Kbps - 256Kbps 7) A-B repeat function and constant repeat 8) OSD language (12): English, Chinese, German, French, Spanish, etc 9) USB: USB 1.1 / 2.0 Port 10) EQ: pop, rock, class, natural, DBB, Jazz, soft, user