Description Micro SD Card-Powerful Function Twelve Tunes preloaded in the memory cards(please note that it plays just a part of the song, not the entire song): 1) IT IS A SMALL WORLD 2) FRERE JACQUES 3) BRAHMS LULLABY 4) TWINKLE LITTLE STAR 5) MARY HAD A LITTLE LAMB 6) SCHUBERT'S LULLABY 7) MOZART'S LULLABY 8) LA LE LU 9) OLD MACDONALD HAD A FARM 10) ROCK A BYE BABY 11) LET ME BE YOUR TEDDY BEAR 12) HUSH, LITTLE BABY Install it on baby crib/bed with arms/bracket, hang toys overthe hooks. The toys will rotate while music playing. There are 2 operation methods: 1,Using buttons on music box to play music in TF Card; 2, Connected with mobile phone via Bluetooth, play music in mobile phone Specification Music Box Dimensions(L*W*H): 3.5in*3.5in*1.38in Weight: 4.37oz Color: White Micro SD Card Capacity: 128M(12 tunes included) Power Source: 2 AA batteries(not included) Support USB Data Transmission: YES 12 tunes already preloaded, you can download anyother music or audio stories at you will via USB cable. Benefits 1.Light music helps your baby easier fall asleep 2.Music may even help strengthen premature babies 3.Music plays a crucial role in `wiring` your baby`s brain for learning. 4.Listening to music will help teach your infant about patterns and sequence, and about rhythm, beat and tone which are useful for problem-solving and reasoning. 5. Early music exposure can help promote critical listening skills, language and literacy, creativity and coordination Note Brackets/arms and toys are not included but available in the market. Package Included 1 x Baby Musical Mobile Music Box 1 x 128M Micro SD Card 1 x USB cable(for data transmission) 1 x User Manual