United States to Guam: No adapter needed
Your United States plugs fit Guam's sockets directly -- no adapter needed for the shape. Voltage is compatible (120V vs 110V), so any dual-voltage or matching device is fine either way.
Your United States plugs fit Guam's sockets directly -- no adapter needed for the shape. Voltage is compatible (120V vs 110V), so any dual-voltage or matching device is fine either way.