I rarely leave negative feedback because sellers are usually quick to satisfy consumers and their experiences however I have to this time. "We really care about our customers" is actually in their terms page but as you will read they really don't. I purchased this item in December of 2015 with the intent of using it within the following month. The event was canceled so I didn't need the product anymore. I hadn't even taken the earpiece out of the plastic because I was so far out from the event it wasn't necessary. When I contacted the customer service they informed me I couldn't return it only exchange it. Their return policy states "We really care about our customers, so if you´re not satisfied with the purchased item, let us know and we can replace or repair the device by your wish. In case the device doesn't work, you can get a refund. Refund implies a full product’s cost excluding 25% (20% of the restocking fee and 5% CCNow fee) from the item’s sum." ***Heres where it gets fun*** "If you've decided to send back your order, you should do it unworn, unwashed and in its original package. Please, take into account that our customers are responsible for paying the shipping costs in case of order return. We do the refund only after the item is checked by our specialists." So how do you check to see if the product works if it must be unworn and unwashed? The bottom line is If you may have any doubt about using this product DONT ORDER FROM GSM-EARPIECE. Oh and by the way, multiple reviews of these earpieces have said the batteries don't last as long as advertised. One even said it died after 30 minutes in an exam.