[4 Mic & ENC Noise Cancellation] - ENC noise cancellation arithmetic ensures clear calls without any disruption along with dual mic in each earbud, one for capturing your voice in the best way and the other for reducing the ambient noise around, making the QCY T13 perfect for conference calls, online courses and video/voice chat. [Melodious Sound & Smart Sleep mode] - 7.2mm dynamic driver inside precisely parse the details and restore realistic sound to pass wonderful notes. Turn on the 'sleep mode', the T13 earbuds automatically shields the touch function to avoid accidental touch. Whether you are lying, sitting, or running, you can use it at ease. [Bluetooth 5.1 Seamless Connection] - The Bluetooth 5.1 technology optimized Bluetooth transmission, flawless connection (75% more stable than the last generation) and enhanced sound. The advanced TrueWireless Mirroring technology balances consumption between two earbuds to provide seamless and reliable audio transmission with low consumpti