How will one take it out after inserting ?
Pull it out.! It seems tricky though.
BTW , why go for so much of hassle ?? Inserting this in your 3.5mm Headphone jack seems pretty useless to me.
We can modify the functions of volume rocker buttons or any other buttons on the device to render similiar functions . Like say pressing the volume-up button twice will trigger flashlight function (on/off) , or take a pic instantly , etc.
And they have even challenged the users to try manipulating the flashlight on/off or taking pics , etc in less than 6-7 steps .
I don't see how that's even close to challenge.