It moves like you do. The 4moms mamaRoo infant seat bounces up & down & sways from side to side, just like parents do when comforting their baby. Select from 5 unique motions, like car ride & tree swing, and 5 different speeds. Choose from 4 built-in sounds or connect it to any MP3 player. The seat reclines to multiple positions to allow baby to lie back & relax or sit up & play. Now Bluetooth enabled so you can control the motion, sound, speed & volume from your compatible smart device.