Enjoy up to 8 hours of listening with these Jaybird X3 wireless earphones. Their Bluetooth connectivity syncs with the MySound app to create custom sound profiles, and they're sweat-proof for use during intense workouts. These Jaybird X3 wireless earphones are 34 percent smaller than the previous X2 model for comfort even under a helmet.
Was spkeptical at first, had gone through a skull candy (left ear lost connection, sound was not that good, bad bass). Sony something .. phone calls were all muffled. Then read the reviews for this one, was not too sure because of it size (but then I had forgotten I have large ears), perfect fit, no loss of signal, walked away about 15 ft with wall into restroom, sound was still going strong. The app for the EQ has all sorts of options and the sound is just right, the right lows, the right highs.. beautiful. Not sure what I will do now with my Shure SE846... Will have to try on the plane, to see how much noise they can isolate. So far so good.