Bluetooth 5.0 with one-time fast  pairing: This quality earphone comes with Bluetooth 5.0 chips, a data transfer rate up to 2 times higher than the previous generation, and a faster and stable connection; After the first pairing, you only need to pick up two earbuds or any single earbud after you open the Bluetooth function, they will open and connect automatically.Game Low Latency Mode & Smart Wear Detection: Activate the game mode to enhance wireless performance,it almost fully synchronizes the audio to the video so that you can quickly locate and react to any situation in competitive gaming;Compared with the previous generation this earphone is the upgraded version has smarter wearable tech: In-Ear Detection: The built-in sensor will pause the music automatically when one earphone is removed, and then put it on, the music will be resumed automatically.Stereo Sound & Long Battery Life: Mi  Bluetooth headphones equipped with the latest moving-coil horn loudspeaker with a bigger dynamic driver, 3D surround stereo, feel like you are listening to the concert on the scene, providing a realistic sound for you. Single charging can maintain earbuds working about 4 hours; the Charging Case provides 5 times charging for earbuds, a total of 20 hours of working time, you could charge your earbuds whenever and wherever you want.Touch Control Function & Single/Binaural seamless switching: Features with touch control sensors, mi true 2S earbuds can largely minimize the pressure to your ears when you touch the button for various functions, more convenient for you when listening to music and making calls; The interconnection method is upgraded again, without restricting the master and slave devices, seamless switching between the single ear and binaural mode, taking it as you go, interpreting true free listening.Ultra-light Comfortable for Ears & IPX4 Water-Resistance & USB Charging: Approximately 4.3 grams, the small exquisite fuselage which perfectly fit your ear canal, it's not easy to lose or fall out when you wear them moving or running; Equipped with USB interface charging more faster IPX4 waterproof can effectively prevent earbuds damage from sweat, rain, and splash, specially made for your sport/travel.