Golzer BTX40 Wireless Bluetooth 4.1 Stereo Headphones with Microphone - Red Great Sound: The Apt-x coding delivers full "wired" audio quality over Bluetooth, whether the audio source is stored uncompressed or in an alternative compression (MP3, AAC, FLAC) format Rechargeable Battery: 2.5 hours for full charge, up to 16 hours of Playback. Charges through standard micro USB port Wireless/Wired: Wireless Bluetooth Mode or Wired Mode. When using the audio cable, the unit is still usable even if the battery is depleded Microphone: Answer Incoming Calls Right on Your Stereo Headphones & Your Music will Automatically Resume When You Hang Up Package Includes: BTX40 Headphones, Travel Hard Case, 3.5mm Audio Cable, Charging Cable, User Guide