4moms mamaRoo - Classic Grey. Parents don’t vibrate like bouncy seats or swing like swings, they bounce and sway, and that’s what the mamaRoo does: it moves like you do. It’s the only infant seat that has five different motions to choose from, as well as being Bluetooth® enabled - allowing you to control both the motion and sound of your mamaRoo remotely from a smart device. Just like the classic, the plush seat is machine washable and easy to zip in and out of your mamaRoo.