I brought 2 Sound Sense Bluetooth Earphones + Portable Charging Box. They are inferiors and do not work. It paired with my iphone the first time, afterwards it could not pair with my iphon anymore. They do not have a number to call. Only way to contact them about technical support and customer services is to send them a inquiry on their site. However, my inquires are not replied at all. Besides, their products are not cheap but got low quality. The bottom is DO NOT EVER PURCHSE ANYTHING FROM THEM. Amazon is much better.