hx1200 bluetooth earphones black headset retractable earbuds long standby wireless headphones csr 4.1 neckband sports earphone headsets with

bluetooth headphones deep bass and crystal clear treble,a button controls the retractable wire (press the retract button to pull the wire to better protect the wire, rather than pulling the wire directly). the length of the wire can be adjusted according to individual needs, and stay away from the wire whenever and wherever. vibration and sound cues for answering calls help not to miss any calls,[upgrade solid battery life] 150mah lithium polymer battery can make music enjoy seamlessly in up to 12 hours, 15 hours of talk time and 350 hours of standby time.