Description: Micro SD Card-Powerful Function, you can use it for any music or sound ,just preloaded it into the memory cards Install it on baby crib/bed with arms/bracket, hang toys over the hooks. The toys will rotate while music playing. Turn On/Off: Long press the left red button for 3 seconds. Play/Pause: Short press the left red button. Loop Single song /Loop Playlist: Short press the right red button. Music/Rotation Separation Switch: Long press the right red button for 3 seconds. Previous track: Short press the left green button. Next track: Short press the right green button. Volume down: Long press the left green button for 2 seconds. Volume up: Long press the right green button for 2 seconds. Specification: 1.Product Dimensions(L*W*H): 3.3in*3.3in*1.34in 2.Product Weight: 5.3oz 3.Color: White 4.Micro SD Card Capacity: 128M (12 tunes included),Support Extended to More Capacity (2GB) 5.Power Source: 2 AA batteries(not included) 6.Support USB Data Transmission: YES 7. There are 12 tunes already preloaded before shipping, you can download any other 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: 1x Baby Musical Mobile 1x 128M Micro SD Card (you can use more More Capacity such as 2GB ) 1x USB cable(for data transmission) ====================================== Option: with DIY Stickers Lovely and colorful stickers let your baby exercise the perception of their eyes by enhancing cognitive ability of figures and colors 6 cute little cartoon animal stickers, diameter is 6.5CM Package Included 1 x Baby Musical Mobile 1 x 128M Micro SD Card (you can use more More Capacity such as 2GB ) 1 x USB cable(for data transmission) 6 x DIY Sticker