10 Soothing Sounds Create a Sleeping Atmosphere---MONSNECE white noise machine offers 10 soothing sounds, including white noise, crickets, sea wave, clock, birds, heartbeat, streams sound, and 3 different lullabies; our sound machine delivers high-fidelity, room-filling sound and robust bass through an advanced stereo speaker, creates a personalized sleeping environment for your baby, your kids or you by masking disruptive noisesIntelligent Sound Detection Plays Music Automatically---In sound detecting mode, the music will auto turn on If continuously receiving the sound exceeds 10 seconds within max10 meters, and then auto stop playing after 15 minutes, keep cycling until no powerExcellent Rechargeable Battery Offers Long Play---The noise machine equipped with a built-in 300mAh rechargeable battery, 1 hour short charging can continuously play for up to 36 hoursIn charging mode, 3 RGB LED lights indicate different status of battery capacity for reminding the user and avoiding over-charge3-Level Timer And Adjustable Volume Helps Handle the Matter Timely---Our sound machine for sleeping has 3 different timer settings (15, 30, 60 minutes) for choosing; users can set the timer for taking naps, temporary relaxation, meditation, concentration while studying and workingLong press next song or previous song button you can customize the sound, volume (from very low to adequately high), non-stop playing or using timer on itCompact Size Plus Lightweight Suit for Travel and Home---Our portable sound machine is portable (37 inches), lightweight (42oz)