Promotional Custom Cheap Aviation Headphone

Promotional custom aviation headphone with very cheap price for airline     How to use headphones correctly on the plane?  [At present, various businesses have launched a variety of noise-cancelling headphones with high-tech noise reduction as a gimmick, including in-ear closed structure, earmuff type, wireless and wired, active Airline Noise Cancelling Headphones and passive Noise reduction, and some manufacturers even say "eliminates 99% of the noise from the outside world, and is a good companion for enjoying music on vehicles." Such advertising slogans, of course, are like the so-called "airplane mode". With the pursuit of profit as the first purpose, they never consider the personal safety of users and the flight safety of airlines. Because these Airline Earphones not only help passengers isolate the noise on the plane, but also isolate a lot of important safety information, especially those Wireless Earphones, which will not only affect the user's per…