I didn?t try to charge it on the USB charging port on the plane. Did not want bluetooth as I am not that tech savvy; 67 years old and only use these with my Amazon Fire tablets and Zune and Sony mp3 players at home. Many tests said 16 max, HP said 32 max, so I took a gamble and decided to order a 16 strip for a total of 24-gigs. I love the thin strap and little metal buckle. The fit runs for me about a size too large. --------------------------------------------------One last thing to note: Gloryfire states in big, bold letters ?US Brand Quality? but they are manufactured in China, just designed in the US. Dont let the picture fool you! Wenn Ihr aber primär spielt und die Anwendungsleistung nicht benötigt, kann es eventuell sinnvoll sein. I used the tool provided in the kit to fix the bars; no ratchet was needed, but the space was tight. It does have a strong smell when you first take it out of the box, I opened mine up and removed the plastic and stretched it out in the sun for a few hours and most of the smell is gone.