Æ?BLUETOOTH 5.0 HEADPHONESÆ??Adopted Bluetooth 5.0 chipset and high sensitivity antenna enabled devices to provide stable and fast seamless connectivity, which also ensure low latency and low energy features during data transmission. Æ?SUPERIOR SOUND QUALITYÆ??The wireless earbuds featuring latest Bluetooth 5.0 technology and state of the art acoustic components that produce incredible sound quality with deep bass and crystal clear treble. Æ?ULTRA LIGHTWEIGHT AND COMFORTABLEÆ??With lightweight skin-friendly materials, the Bluetooth headphones weight only 12.5g (0.4oz). They won't bring you any burden even if you listen to the song for a long time. Æ?IN-LINE MIC & BUTTON CONTROLÆ??Thanks to in-line mic and button control, you can enjoy hands-free phone calls, adjust volume and mange previous/next track conveniently. Æ?1 YEAR WARRANTYÆ??(1) Dear customers, we would like to make clear that: From your review, Amazon do not provide the access to your order details. So, we hardly have any chance to contact you to solve your issues. (2) You are fully covered by our 1 YEAR WARRANTY and 60 DAYS RETURN GUARANTEE, all you need to do is contacting us directly at the buyer center or support email, or leave a feedback to us. We would respond within 8 hours normally.