Warm glowing lights and soothing sounds of this cuddly penguin will calm your little one and help them sleep peacefully for longer. Percy comes with the built-in CrySensor. When in standby mode - the penguin listens intently for any baby sounds and noises within a room for 3 hours. Whenever your child starts to stir or begins to cry, Percy plays either static white noise or Brahms lullaby for 20 minutes and then returns to its standby mode. In addition to the standby mode, you can turn on two other sounds: falling rain or heartbeat (switch ON/OFF on the wings). A secure hanging loop enables you to hang it on the side of the cot, pushchair or car seat.