features advanced true wireless (TWS) BT 4.2 technology, built-in high-grade microphone speaker, hands-free function and lightweight design. It will offer you amazing experience; you can greatly enjoy your favorite music when doing sports. Features: [Advanced BT Technology] Latest true wireless (TWS) BT 4.2 technology ensures transmitting strong signal in high quality high speed and offering high-fidelity stereo music. [Unique Design] Wireless Dual Ear Stereo Design, Left and Right Ear Channel Separation; you can use its Left and Right Ear Headset solely (Single Track Mode), and it also can be used in pairs (Stereo Mode). [Emergency Power Supply] Comes with 2100mAh charging box, which can be used as a portable power bank and offering power supply to the BT earphone, as with USB port, even can charge for your smartphones when in urgent need. [Strong Wireless Signal] Its wireless effective range is up to 10m, so you can enjoy the freedom to move and the convenience of uncompromising sound quality. [Multi-point Technology] It can simultaneously connect two smarts phone. So you can seamlessly switch between your business and personal phones.