Review on ✈️ Cmple [10 Pack] Audio Airplane Adapter: Dual 3.5mm Male to Female for Airline Flight Headphones by Sam Lund

If you're lucky enough to find one that works, you'll find that it sums stereo to mono and that's after you've really rocked it, so you hear not just a title. Some of them are tight or impossible to connect, others are so loose that they don't provide a reliable connection. You can't trust them to even play summed mono without checking the headphones, making them null and void in a complex patch. At least half ends up in the trash because they don't work at all. What mistake.