mamaRoo 4.0 This infant seat bounces up and down and sways side to side, juat like parents do when comforting their babies. It has five unique motions which are: Car Ride Kangaroo Tree Swing Rock-A-Bye Wave Control Motion and Sounds with your smart device. *The 4moms app for iOS is compatible with all Apple devices newer than the iPhone 4s that are running iOS 9 or newer. The native Android app is compatible with most Android devices that support Bluetooth Low Energy and are running Android 4.3 or newer. Use of an aux will allow you to play your favourite songs and the mamaRoo 4.0 comes with 4 preset soothing sounds. Other Features: Adjustable seat unit for maximum comfort and ability to fully recline Reversible new born insert provides added support and comfort to new borns (sold seprately) seat fabric easily removable and machine washable. Important Specifications: Max Child weight: 11.3kg/25lbs or ability to sit up unassited.