10 High Quality Sounds: This white noise machine baby has a total of 10 sleep music, including white noise, nature sounds (electricity, waves, thunder, rain, etc.), children's sounds (heartbeat, little stars, lullabies and other sounds), suitable for sleep music at bedtime, sleep music for babies, yoga meditation music, etc. which can be applied to a variety of relaxation needs. Memory function & Timer Shutoff: This portable white noise machine has a memory function that saves the lights, sounds and volume settings from the last time you used it, so you don't have to reset them to use it again is practical. Continuous playback or 15, 30 or 60 minutes auto power off, set the timer on your audio device to use it more efficiently and save power! Long battery life & Environmental protection: This white noise machine has a built-in battery, charging for one hour, can be used continuously for 20H, the endurance is very strong, but also a Type-C charging cable, no need to replace the battery, can be recharged and recycled become, more energy saving and environmentally friendly, convenient to use at any time! Safe Mode: Long press the Auto button until the white light turns on to activate the monitoring function. Once a baby cries, the white noise will ring automatically, and the music will turn on and stop automatically after 15 minutes, the detection distance is 6-10m. Compact and portable: the white noise machine is compact and can easily fit in a bag or suitcase, perfect for home, office, car and travel, can be used anywhere, perfect for travel companions. The included lanyard can hang the product on the stroller for easy use