White Noise Sound Machine | Portable Sleep Therapy for Home , Office , Baby & Travel | 6 Relaxing & Soothing Nature Sounds , Battery or Adapter Charging Options , Auto-Off Timer | HoMedics Sound Spa 3.6 out of 5 stars 10,258 $18.99 source https://www.amazon.com/Portable-Relaxing-Soothing-Charging-Auto-Off/dp/B00A2JBMRE/ref=zg_bs_3206325011_10/137-0098435-2551057?_encoding=UTF8&psc=1&refRID=9PSHACKMTB3BFVZEGK8M
