The Heartbeat Plush is a musical soft toy which comforts and soothes your little one by mimicking Mum's heartbeat. There are 6 different sounds including the womb sound with heartbeat, waterfall sound and 4 different soothing melodies. The voice activated sound sensor will switch on the sound if your baby starts crying and will then automatically switch off after 10 minutes. You can activate the sound by shaking and then set the volume to the preferred level. No need to switch ON the music, just shake and the last chosen song will start playing. The soft toy can be washed (remove the sound module beforehand) and it is operated by 3 AAA 1,5 V alkaline batteries (not included).