Thanks! The Hugo should be fine - if the authorities question, just say it powers headphones. If you bring a CIEM, you'll be okay, especially if you keep it on you and place it so it is visible on the security conveyor belt. Now, with other items that I bring (like IEMs, DAC/Amps, headphones, etc.), they fully search me, search all of my bags, each time, no matter where I am, no matter what. Global Entry has been good, but doesn't play a significant factor, if at all, when you are traveling internationally. Any more questions with regards to customs, treatment and the sort, feel free to PM me.