The 4moms mamaRoo infant seat bounces up and down and sways from side to side, just like parents do when comforting their baby. Our team used motion sensors to measure the movements moms and dads make as they soothe their babies and then replicated those motions in the mamaRoo. Select from five unique motions (car ride, kangaroo, tree swing, rock a bye, wave) and five speed options. Choose from four built-in sounds or connect it to any MP3 device. The seat reclines to multiple positions to allow baby to lie back and relax or sit up and play. The mamaRoo now has bluetooth capability which allows you to connect your phone to the mamaRoo remotely, you may now control the speed, select the unique motions, and control the music of the mamaRoo seat via the app on your samrt phone.