BT stereo Headphone offers advance Life State Technology lets one see the level of one Headphone’s battery at a glance on iPhone. Never run out of battery and always know when this Headphone needs a charge. Now easy as Pie with the Lifestyle Life bar on the Screen! No Software Installation Required! Enjoy super accurate media playback in STEREO CD tone quality and unmatched voice communication through smart phones, tablet or computer. Relax, listening to music with FULL, DEEP BASS and RAZOR SHARP HIGH END and make perfect conversation through the premium microphone with Noise Cancellation Technology MICROPHONE AND VIBRATING CALL ALERT the built-in microphone makes it possible to use the Headphone for Phone calls, Skype, youtube, Gaming and much more. The Vibrating Call Alert lets one NEVER MISS A PHONECALL while listening music. The Headphone VIBRATES INDEPENDENTLY from the phone when a call comes in and the audio one were listening to is intelligently silenced. When one hang up, the audio starts back up AUTOMATICALLY. Together with the Headphone get EASY TO UNDERSTAND User Manual and the USB-charging cable (charges the Headphone at ANY USB-port/ Adapter.