XINGLAN Bluetooth earphones, Wireless Bluetooth Sports Headphones Headsets Headphones (Black) The headset is sweat-proof, portable and lightweight. The wireless headset can stay in your ears stably and comfortably to let you enjoy music while exercising or being involved in other activities. The most advanced Bluetooth CVC6.0 noise cancellation technology is applied to improve voice frequency transmission performance. Incoming calls report, acoustic answer Bluetooth 4.1 technology is applied to the Chip to improve the signal strength by nearly twice that of the general Bluetooth headsets, high-fidelity stereo music and clear speech are available and you are able to enjoy CD-quality stereo sound instantly. Connent with 2 Phones and use at the same time