Inspired by natures sunrise the philips wake up light uses a unique combination of light and sound to wake you in a more natural way it helps you to feel more refreshed so that it is easier to get out of bed2 natural soundsat your set wake up time a natural sound will play to complete the wake up experience and ensure you are awake the selected sound gradually increases in volume to your selected level within one and a half minutes there are two natural bird sounds you can choose frombed