Wireless headphones for plane use

[SlackBladder]

Following on from all the recommendations in a previous thread I'm thinking of getting a pair of Bose QC35 II's, but can't get my head round spending the extra when their main use would be when watching in flight films and therefore would have to be plugged in. Might as well buy a decent set of standard wired headphones if that's their main purpose?
Alternatively would this set up work:-

https://www.amazon.co.uk/Bluetooth-Transmitter-Rec...

combined with the headphone adaptors that come with the QC35's, although I may need a separate adaptor as Emirates have a 3 pin socket rather than the standard 2.