AirFly

Sitting at the airport gate, I plugged this into the seatback screen and suddenly had my own private movie soundtrack through my wireless earbuds. It’s so small I forgot it was in my pocket until I needed it.

Finally cut the cord on my ancient wired earbuds without buying new ones - this thing just plugs into the headphone jack and pairs instantly. The battery lasting through a full cross-country flight is exactly what I needed.

Took this on a long train ride and the battery easily lasted my whole round trip, so I never had to worry about it dying mid-movie. It's small enough to clip right onto my shirt, which made switching between the seat-back screen and my own music a total breeze.