The Apple Lightning to 3.5mm Headphone Jack Adapter is retailing for S$14 in Singapore.
Surprisingly, most Authorized Apple Resellers were out of stock. I managed to get the last two pieces from iStudio at Paragon.
The build of this lightning headphone jack adapter seems very fragile. The cable felt thin and gives me the feeling it may break anytime. So I don’t expect this to last long.
I would still go with a Bluetooth earphones/headphones if you are using an iPhone 7/7 Plus.
For Bluetooth earphones, I am currently using Sudio Vasa Bla which is value for money.
For Bluetooth headphones, I am currently using V-MODA Crossfade Wireless Headphones which sounds pretty good.
I am still hoping to get the Bose QuietComfort 35 wireless headphones one of these days.