Over Ear Wireless Headphones ZEALOT&reg; B5 Bluetooth Headphones Hands-free Calls Computer Headphone High Fidelity [Comfortable Earmuff] [Micro SD Slot] [Stereo Music] [Microphone] (Silver) LIVE, RICH, AUTHENTIC STEREO SOUND with dual-channel speaker processing: 90db high sensitivity, 64ohm headphone impedance, and extra prominent 200mw output recreate premium sound quality with B5 Bluetooth headset's 20Hz-20KHz frequency range ULTRA COMFORTABLE & LIGHT WEIGHT: B5 Bluetooth headphones earmuffs are made by human-skin-texture like artificial protein supramolecular leather. Beyond long wearing comfort, over ear ear-pads are perfect for noise-isolation, give you personal moments free from background surroundings EXQUISITE DETAIL RESOLVEMENT in manufacturing technique with quadruple producing time; Gorgeous design in every detail of B5 headphones, with its swiveled earmuffs, adjustable head-band, refined leather tactile impression, and glossy texture, match the premium high-end demand YOUR CALL FOR WIRELESS OR WIRED: B5 is designed as wireless headphones, helping you get rid of tangled wires. One key to start Bluetooth pairing, B5 will auto connect the last paired phone within a 33-Foot range. Also AUX cable is equipped for devices which are not Bluetooth-enabled. By simply plugging 3.5mm audio cable to phone/laptop/iPad/computer, you can listen to stream music anytime without switch on these headphones MICRO SD CARD MP3 PLAYER is available for this full packaged Bluetooth headphone with built-in microphone; Highly compatible with Android smart phones and Apple devices