What type of plug adapter does a Whish require? May 12, 2020 15:50 The type of plug adapter needed is a USB Type-A, 5v DC power supply Related articles Can I use a timer smart plug with my sound machine? How do I set the timer on the Whish sound machine? What is the difference between the Rohm and Hushh? What is the energy usage for the sound machines? Is Yogabed™ easy to set up?