From the technical point of view this is a speaker system that a pregnant woman can attach to her belly and help her fetus enjoy the beautiful vibrations of music, which, according to some researchers, stimulates mental capacities of the baby before it's born.
Probably the most interesting feature of the device is that mother can use it to talk to the baby while it's in the womb by making use of her iPhone. You might consider it the first cell phone of your baby.
After the baby is born, the mother can attach the system to a stroller, so the baby could enjoy music while riding or sleeping. You can buy the Ritmo Advanced Sound System for $ 129.99.