ZhiZhu Over the Head Driver's Wireless Bluetooth Headphones Headset With Flexible Boom Mic and Charging Dock HIGH QUALITY SOUND: Featured with noise cancelling technology, our headset provides you clearer sound for calls, while you are staying at home or in the office. ULTRA LONG PLAYING TIME: Powerful rechargeable battery provides up to 13 hours of talking time. And up to 220 hours of standby time after it is fully charged. MULTIPOINT PAIRING AND CONVINIENT USE: The headsets are suitable for any bluetooth products and can pair with 2 different devices simultaneously.No need to worry about miss any important calls. COMFORTABLE WEARING: The ear cushion is slightly cupped for a better fit and the adjustable headband won't slip out. NOTE: The bluetooth headset is specially designed for calling. Can't work for listening music.