"Mirari Glow to Sleep is the perfect tool to help develop a nighttime routine for babies. It offers soothing lights and sounds to create a peaceful environment, and parents can customize what music, sounds or stories play using the Bluetooth capability or SD memory card slot. So those babies who love specific sounds, like maybe classic or country music, can have that!
Use one of the 10 included sounds (lullaby, white noise, ocean, train, shush, rainforest, rain, heartbeat, car, babbling brook); connect to your smartphone, tablet, computer, etc. with Bluetooth to play your own music or stories; or use the micro SD memory card slot to load different songs.
The rechargeable lithium battery lasts for up to 7 hours of use; micro USB port with charging cable included. Wall adapter/plug not included."