Rabbit Doodoo - Calms the Crying Baby with Womb Sounds - Automatic Turn On Puts the Baby to Sleep at Night Calms the crying baby with womb sounds. Turns on automatically. No more waking up in the middle of the night: when the baby starts crying, womb sounds turn on and put the baby back to sleep. From birth to 9-12 months old: after this period the womb sound effect starts to subside. Than you simply setup the sound unit to the babys favorite lullaby that soothes baby when crying - this can be used for another 3-4 years. Washing machine friendly at 30C: you just have to remove the sound transmitter. Anti-alergic plush - premium quality, 2 year warranty, more than 1 million sold!