This Bluetooth wireless, stereo foldable headphone with mic delivers crystal-clear sound, free of annoying cables, all with a stylish, modern look. These headphones allow you to listen to music from your favorite Bluetooth compliant MP3 player or use as a hands-free headset for your cell phone. These headphones support headset profile (HSP), hands-free profile (HPF), advanced audio distribution profile (A2DP), and audio-video remote control profile (AVRCP) - meaning you'll have full control over your music (play, pause, volume up/down) without having to remove your player or phone from your pocket! Power management has never been easier with the PBT55D. These headphones give you 12 hours talk time, 10 hours listening time, and 260 hours standby time. LED light signals line-in-use and battery level. An AC adaptor is included for charging.