Parents can't always rock babies like the rocking chairs do not hammock them up like a hammock. We believe that infant seats would be a better choice if they can mimic the natural movements that parents make to calm their baby, and therefore they created the Mamaru Child Seat. Dads and moms have them dressed with sensors to understand these moves, then mimic the shaking and swings of the Mamaru chair to soothe and entertain your baby better than traditional infant seats. Feature: Shake up and down and swing between the sides as parents do. 5 speed and 5 unique movement: up and down, swing from side to side as parents do to soothe their child Built-in sounds, MP3 player: choose from 4 sounds to calm baby or play your favorite songsConnectivity Bluetooth Technology: to control the motion and audio with its compatible smartphone. No battery required, only plug in electricity Adjustable seat to full tilt position reversible play balls Machine washable fabric