I used it for about 1 month, yeah it works, nothing wrong with it. But its SOOOOOO HUGE. It looks like im wearing ear muffs in the snow. and some time you accidently press the on button once that thing will keep blinking blue the whole week, it seems to never run out of battery. i charge 1 every like 5 months literaly. Some say thats a good thing. But for some reason i dont like it.