Can I use my portable sound machine (Rohm, Hushh,or Go) while it's plugged in and charging? May 12, 2020 16:37 Yes, all of our portable sound machines are operable and can be turned on while charging. Related articles What is the difference between the Rohm and Hushh? Are the USB cables for the Rohm and/or Hushh units compatible with the adaptive fast charging power adapters? How do I charge my Hushh, Rohm, or Go? My Hushh sound machine won't shut off. Help! How long does the Travel Mini battery take to fully recharge?