Bluetooth 4.1 connection with steady signalLine‎-in remote control and mic‎:‎ skip track or turn the volume up and down with the in‎-line remote control‎;‎ enjoy hands free calling on the go thanks to the built‎-in microphone240 hours standby time‎,‎ up to 8 hours talking timeAlways‎-safe magnetic design‎:‎ keep the headphones discreetly around your neck‎;‎ the built‎-in magnets keep them in place to avoid losing themMedical silicone ear caps and ear hooks ensure long time comfortable wearingBraided TPE cable‎,‎ durable and flexibleWith CE‎,‎ FCC and RoHS certifications