10 soothing sounds: 10 non-repetitive, smooth, natural sounds, including nature sounds and baby lullabies. You can choose your favorite sounds to release from your busy schedule and effectively relieve irritability, tension and irritability Timer mode: The white noise machine can be played continuously or you can set a 15/30/60 minute auto switch-off timer to avoid forgetting to switch off the machine when you fall asleep Timer memory function: when the white noise machine is turned on again, it will automatically restore your last setting Safety mode: press and hold the auto button until the white light comes on to activate the monitoring function Once a baby is crying, the White Noise Machine will automatically sound and turn on the music automatically and stop after 15 minutes, detection distance is 6-10 meters Parent's helper: the White Noise Machine is a sleep noise machine suitable for babies, allowing the mother more time to do what she likes For parents of newborns, white noise is an effective sound therapy to stop babies crying Small and portable: USB fast power supply, long battery life, small size of 9.3*8*2.8cm, easy to carry in your bag or suitcase, great for home, office, car and travel, can be used anywhere, perfect for a travel companion. It is the perfect gift for family, friends and parents of newborns