Bluedio U (UFO) Faith series High-End Bluetooth headphones Revolution Patented 8 Tracks /3D Sound Effect /Aluminum alloy build/Hi-Fi Rank wireless&wired Over-Ear headphones/headset with carrying hard case Gift-package (Titanium) Want your music to be detailed and balanced? Bluedio exclusive Pps8 technology makes it come True. With innovative 8-driver design, every note is accurately reproduced. Dramatically enhancing your music doesn't have to be complicated. Simply turn on 3D sound, the sound spaciousness is extended to complete an Immersion feeling. Beautifully Crafted with top notch al-ti alloy, sturdy and durable to last for long time. Up to 25 hours of Bluetooth playback from latest Bluetooth 4.1 low-power technology The Bluetooth flawlessly works with your smartphone, tablet or Bluetooth enabled MP3 player. NOTE: there may be compatibility issue with other devices. Connectivity technology : Wired and Wireless