The Fisher-Price® 3-in-1 Swing 'n Rocker is a full-size baby swing, stationary infant seat, and toddler rocking chairin one! In swing mode, SmartSwing Technology offers 6 distinct swinging speeds from low to high so you can find just the right motion to help soothe your baby. The swing actually senses your baby's weight (so speeds won't slow as your little one grows)and it starts without a push! Easy-release seat handles make it easy to remove the seat from the swing frame for use as a stationary infant seat or rocker. And the comfortable rocker seat holds up to 18 kg, so toddlers can continue to use it as a "big-kid" rocking chair! Requires 4 D batteries.