HAVIT HV-H931BT In-ear Wireless Bluetooth 4.1 Earphone, Magnet Circle for Apple and Android [Magnetic Feature] Completing with magnet at the end of each earplug, allows you to wear it around your neck in a circle, like a necklace in a way, without worrying about losing it. [Intelligent Control] Separation and absorption provides you convenience in controlling the headphones. Separation helps you to answer the phone automatically when calls coming, Absorption means pause the music when listening to music and end a call when calling. [Bluetooth4.1 technology] Supports connect two devices simultaneously and allows to automatically connect after paired successfully for the first time. Up to 7 hours talk time and playing time, support voice chat and voice prompt [Universal compatibility] Compatible with most Bluetooth-enabled cell phones, works with iPhone and Android.