AirFly Pro 2 Deluxe

Took this on a ten hour flight and my boyfriend and I watched the same movies with our own headphones paired at once, which was the whole reason I bought it. Setup took maybe thirty seconds and the sound through my Bose was clearer than the plane's cheap earbuds.

Plugged this into the seatback screen on a six-hour flight and my Bose headphones connected instantly, no fiddling with cables. The shared listening mode saved us — my daughter and I watched the same movie with our own headphones and the audio stayed perfectly in sync.

My wife and I used the two-headphone pairing on a nine-hour flight and it actually worked without any lag between our sets. Controls were easy to figure out without digging out the manual. Battery held up for the whole trip there and back.