Works very good. The function button on the inline mic is only for answering and ending calls. Ge longer screws than the ones it came with. Cable is made of a nice low-tangle material that feels more premium than standard wire. Unfortunately, the battery life is NOT as advertised. Why not five stars? Well, these things are a bit cheaply-made and rough around the edges. My son had no idea I was on headphones during phone call and I could hear him better than ever. Also to add salt to the wound, Amazon took WEEKS to refund the order after having received the product back, so you might want to take that into consideration as well when thinking of ordering this unit. Ive worn Birkenstocks for decades and truly love them, especially since the Soft Footbed was introduced which was a vast improvement. How these flip flops have a loyal following is beyond me , to pay almost almost 50 dollars for a flip flop with no traction on the sole is I cannot understand.