Calming vibration if kids are crying or anxious. Strong Steel Alloy Frame, Long Lasting, Safe. Machine washable pad. Easily converts to a toddler rocker. Better for baby. Encourages Developing Motor Skills. Reposition seat closer to toy bar for interactive play. Birdie plug-in toy sits within reach of baby detaches for take-along play . Fold out kickstand for feeding or napping. Toy bar swings away for naptime. Removable toy bar. Frame extends to higher position for toddler rocker or stationery seat. Specification : Maximum weight of child for rocker 18kg Require 1.5V Alkaline Battery (Not Inlcuded) Net weight: 2.99kg