BBaby Einstein Mobile, Sweet Sea Dreams ReviewbP PP Baby Einstein Mobile, Sweet Sea Dreams PPolyester, PlasticPFeatures 10 soothing classical melodies 20+ minutes of continuous playP2-in-1 mobile base features a mirror for self-discovery and detaches to become a sootherPUnique Drift Off feature - melodies gradually soften after each 10 minutes. Perfect Fit Universal Crib Attachment fits most crib railsPMultiple play modes - melodies, ocean sounds, and white noise.