Charging Box: The 350mAh charging box can provide full power to the earphones for 2-3 hours when it's fully charged, it can also be a perfect storage case for earphones, protecting them from damages.. TWS BT Design: Wireless dual ear stereo design, left and right ear channel separation. You can use the Left and Right ear earphone solely (single track mode), or use them in pairs (stereo mode).. Noise Reduction HD Call: Built-in high-sensitivity microphone reduces ambient noises and grasps the detail of voice, ideal for in-car calling or working use.. Advanced BT Technology: True wireless (TWS) BT technology ensures seamless connection with all BT enabled devices up to 24meter without interruption.. Button Control: Easy to use with a slight press on the button, will bring more convenience to your daily life, office time, driving or travel.