Our wireless earbuds adopt advanced Wireless 5.0 version with multi-point technology, simultaneously connect with 2 mobile devices, high-sensitive inbuilt mic with CVC noise canceling technology, deliver crystal clear stereo sound with transmission range up to 39.3ft without barrier. Inbuilt with interactive biosensor, voice assistant is on call. High effective magnetic charging technology enables our tws earbuds to charge fast and transform energy effectively. Inbuilt 65mAh rechargeable battery