Sound Machine | Portable Sleep Therapy | White Noise Machine with with 8 Soothing Nature Sound,Battery Powered/Electric,AutoOff Timer,Headphone Jack,USB Charger for Baby,Adult,Home,Office. 1 Count (Pack of 1) out of 5 stars 1,650. 23. 99 (/Count) Join Prime to save on this item. Likii White Noise Machine Sound Machine for Baby Sleeping .