SONY wireless stereo headset MDR-EX750BT/L (Viridian Blue)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Headphone part: Model closed dynamic / Driver unit: 9 mm dome type (CCAW voice coil adoption) / Sensitivity: 105 dB / mW (when wired connection) / code length: about 1.0m， silver-coated OFC Litz wire， removable / input plug: gold-plated L-shaped stereo mini plug Mass: (not including code) about 38g / frequency characteristic: 5Hz-40KHz / corresponding impedance: 16Ω </span></li><li><span class="a-list-item"> Microphone part: Model MEMS / directional characteristics: omni-directional / effective frequency band: 100Hz - 8，000Hz </span></li><li><span class="a-list-item"> Power: DC3.7V: Built-in rechargeable lithium-ion battery / charging time about 2.5 hours (full charge) / charging method: USB charging / battery duration (continuous audio playback time): about 7.5 hours / battery duration (continuous talk time ): between about 7.5 hours / battery duration (standby time): about 200 hours </span></li><li><span class="a-list-item"> Bluetooth: communication system Bluetooth standard Ver.4.1 / Output Bluetooth standard Power Class 2 / maximum communication distance: line-of-sight distance of about 10m </span></li><li><span class="a-list-item"> Accessories: dedicated headphone cable (about 1m)， hybrid earpiece SS， S， M， L (2 each)， micro USB cable (0.5m)， Carrying pouch， clip， Japanese manual </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31k5CUyKsML.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31WrI7Rwg9L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31NLxyKl7cL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31Hrvjj2xZL.jpg" noproxy>