Miui (its not stock Android but give it a chance. Was a very good price for how well and quickly it charges up my iPhone! The screw holes also are covered with caps, others are left open with screw heads visible. 5 receiving end and has flat transitions on the lightning side as well. I bought this on recommendation from my personal trainer and I was decently happy with it for a while, but Ive had it for less than a year and nearly all of the screws that hold it together have fallen out. 0/5The only bright point was Amazons ability to let me return. Pretty good for the price and affordable to start in-ear monitor setup This is sad, because these are fantastic. The downside is that its roomy (not long, but wide), and the arch support is okay, not great. Ordered one size larger than normal and the fit is perfect.