1.Size:10.4*8.2*10.2cm2.Power supply: 3 * AAA batteries (not included) 3. Calendar， time， date， week display4. 12/24 hour conversion5. chord music / nature sound alarm6. Snooze function7. countdown function8. Music mode (10 music selection)Romantic Symphony Star . Colorful Star projecting a sense of rhythm with the music