Highlights Bluetooth 5.2 Stable transmission, Dual-core chipset enhances transmission speed, Maintaining connection stability. Wireless charging mode when placed on and can charge battery case by lightning cable. Smart pop-up pairing, showing the power status of earphones and charging case. Primary and secondary switch quickly, two earbuds are connected to the device separately, support for using single side or both sides. 5. Built-in microphone for hands-free calling and answering by touching Overview The Joyroom JR-T03S TWS stereo headphones have an advanced audio system that reproduces crystal-clear audio, be it with high notes or low notes. You can listen to music, and experience the sound effects of TV shows, movies, and sports and get a realistic feel. The unique NFC feature lets you connect these Joyroom wireless headphones to your NFC-compatible smartphone, MP3 player, or other devices. The charging battery box enables you to replenish the drained-out power of the 30mAh battery quickly. JR-T03S PRO Connectivity: WirelessCompatible with: Mobile PhonesType: In EarMicrophone included: YesNoise Cancelling: Yes Are batteries needed to power the product or is this product a battery: NoIs this a Dangerous Good or a Hazardous Material, Substance or Waste that is regulated for transportation, storage, and/or disposal? : NoExternal