features advanced True Wireless (TWS) BT Technology, built-in high-grade microphone and speaker, hands-free function and lightweight design. A great companion for your daily life, office time, driving or travel. Features: Advanced BT Technology: True wireless (TWS) BT 4.1 technology ensures transmitting strong signal in high quality high speed and offering high-fidelity stereo music. TWS BT Design: Wireless dual ear stereo design, left and right ear channel separation. You can use the Left and Right ear headset solely (single track mode), or use in pairs (stereo mode). HD Microphone: High-sensitivity microphone reduces ambient noises and grasps the detail of voice, ideal for in-car calling or working use. Multi-point Connection: It can simultaneously connect two smartphones, so you can seamlessly switch between your business and personal phones. Charging Box: The 450mAh charging box can charge for the earphones and can be used as a perfect storage case for them, protecting them from damages.