The 4moms mamaRoo4 infant seat bounces up and down and sways from side to side, just like parents do when comforting their babies. It features five unique motions and five speed options for a total of 25 different combinations. Soothe your baby with one of the four built-in sounds, or connect any MP3 device. The mamaRoo4 seat offers full recline to allow baby to lie back and relax or sit up and play. Bluetooth compatible - adjust the settings without disturbing baby using the 4mom app.