1. Calendar Functional between January 1, 2001 and December 31, 2099; 12/24 hour-system offered for selection; Able to display year, month, day, time, minute, second and week; The ultra-low standby power consumption less than 15 microampere; Time calibration for only once due to the back-up battery that powers the embedded alarm clock chip. 2. MP3 Player With SD/MMC card and build-in memory, the storage capacity is up to 4GB 3. Formidable Music Alarm Clock 4. 2.0 Mini-Hi-Fi Amplifier 5. Card Reader The alarm clock is capable of reading SD/MMC card.