Smart M8 Tws With Noise Cancellation will forever change the way you use headphones. Whenever you pull your earbuds out of the charging case, they instantly turn on and connect to your device. Audio automatically plays as soon as you put them in your ears and pauses when you take them out. To adjust the volume, change the song, make a call, or even get directions. use optical sensors and a motion accelerometer to detect when they are in your ears. Double tap the back and place on your wrist to check your body temperature.