Ergonomic design. Extremely soft and comfortable rubber ear hooks which ensure you hold the earphones firmly to your ears. Bluetooth 4 1 offers a faster connection and is more energy efficient. CVC6 0 noise reduction technology and integrated microphone. Small powerful speakers to reproduce precise sound and deep bass it ensures the music and conversation more pure professional undamaged. The multifunction buttons in the headphones control all the functions (volume sound music call) of your smartphone directly on the earpieces very simple use with hands-free. These Bluetooth headsets are compatible with most Bluetooth devices for example: iPhone iPad iPod Touch Android Smartphones tablets other Bluetooth devices.