The headphones develop a rich, deep high quality sound. Built in Microphone for easy call answering, is a full size headphone that easily syncs with any Bluetooth enabled device such as Smartphones Tablet and portable devices. . Utilizing a 40mm neodymium driver unit, enjoy bluetooth stereo and hands free. Product Features Bluetooth protocol standards:Bluetooth V4.1 +A2DP, CSR solution,HSP,HFP,A2DP,AVRCP Lets you wirelessly connect to compatible devices, including select Apple iPhone 6S/6/5s/5c/4s/4c/3/2 iPAD iPod, Android Smart phone; Samsung Galaxy S6/S5/S4/S3 Note4/3/2; Galaxy Tablet; Nokia Toshiba Sony and BlackBerry Smart phone and devices; most Mac and Bluetooth-enabled PC laptops Tablet and desktops. Built-in microphone Allows clear communication; Enables use as a headset. Music and phone controls ensure ease of use. 3.5mm audio jack Provides a simple wired connection of a variety of devices. 40mm drivers Along with neodymium magnets produce deep, enhanced bass and full-range sound for dynamic audio. Sound-isolating design Built-in rechargeable lithium-polymer battery enables up to 7 hours of talk time or audio playback. Carrying pouch Protects the headphones during transport and storage. 20Hz - 20kHz frequency response Offers faithful sound reproduction. 64 ohms impedance Space-saving foldable headband Allows simple transport and storage in the included hard travel case. Included micro USB charge cable Passive noise reduction Up to 15dB blocks background sounds for an immersive listening experience. Noise Blackout with dual microphone technology promotes optimal call quality. 119dB sensitivity (@ 1kHz)