Wireless Bluetooth Headphones, BEISTE V4.1 Sweatproof -Premium Stereo Sport Earphones with Build-in Microphone Compatible with Any Cellphone(black) Functions: Volume up/Volume down/ Playback/Previous/Lowe Battery Warning/Answer/ End/Reject Call/ Transfer call voice/ Connect 2 devices at same time/Transfer calls between 2 mobile phones/Replay the phone/Mute/Default setting/Turn off voice notifications/Turn on voice notification Fast pairing with phones/ipad Hi-Fi Stereo Sound Comfortable stable and high quality Earbuds Premium rubber Earbud : clear, natural, unique sensing technology,comfort fit to your ears.