You’d better attach enough importance to headphone selection because a good headphone has a great impact on tone quality. This HT Upgraded Version Head-mounted Stereo Bluetooth V4.1 Sports Music Headset with Micro-SD Card may be a wonderful recommendation for you. Advanced technology guarantees the durability and high performance. What is more, with stereo audio effect, this headphone could emit clear and fair-sounding sound, which will greatly meet your need. And thank to its ergonomic design, it is quite convenient to use. You can enjoy maximum sound quality experience with this headphone!<!--Features --><p>FEATURES</p><UL><LI></LI><LI>Bluetooth V4.1 head-mounted headset, wear comfortably and conveniently</LI><LI>Excellent tone quality and stable performance</LI><LI>High quality headphone for clear voice pick-up</LI><LI>Ergonomic design will bring you much comfort without any irritation</LI><LI>Support ISO battery display, voice control, long standby time, micro-SD card data transmission and radio</LI><LI>Powerful bass; suitable for the game, music and talking</LI></UL><!--Specifications --><p>Specifications</p><TABLE class=ke-zeroborder border=0 cellSpacing=0 cellPadding=0 width="100%"><TBODY><TR><TD width=131>Color</TD><TD width=365>Black</TD></TR><TR><TD width=131>Bluetooth Version</TD><TD width=365>V4.1</TD></TR><TR><TD width=131>Operating Distance</TD><TD width=365>Up to 10m</TD></TR><TR><TD width=131>Support Profiles</TD><TD width=365>A2DP, AVRCP, HSP, HFP</TD></TR><TR><TD width=131>Impedance</TD><TD width=365>16┯</TD></TR><TR><TD width=131>Sensitivity</TD><TD width=365>110dB</TD></TR><TR><TD width=131>Transducer Type</TD><TD width=365>Dynamic</TD></TR><TR><TD width=131>Frequency Response</TD><TD width=365>20Hz-20KHz</TD></TR><TR><TD width=131>Music Time</TD><TD width=365>Up to 40 Hours</TD></TR><TR><TD width=131>Talking Time</TD><TD width=365>Up to 45 Hours</TD></TR><TR><TD width=131>MP3 Playing Time</TD><TD width=365>Up to 15 Hours</TD></TR><TR><TD width=131>FM Playing Time</TD><TD width=365>Up to 15 Hours</TD></TR><TR><TD width=131>Stand-by Time</TD><TD width=365>Up to 1625 Hours</TD></TR><TR><TD width=131>Charging Time</TD><TD width=365>About 2 Hours</TD></TR><TR><TD width=131>Operating Temperature</TD><TD width=365>-10→ to 50→</TD></TR><TR><TD width=131>Dimensions</TD><TD width=365>(6.89 x 6.69 x 3.35)" / (17.5 x 17 x 8.5)cm (L x W x H)</TD></TR><TR><TD width=131>Weight</TD><TD width=365>7.20oz / 204g</TD></TR></TBODY></TABLE><IMG alt="" src="http://www.image-tmart.com/info_images/82027554-1.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82027554-2.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82027554-3.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82027554-4.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82027554-5.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82027554-6.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82027554-7.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82027554-8.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82027554-9.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82027554-10.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82027554-11.jpg"><!--Package Includes --><p>Package Includes</p><UL><LI>1 x Bluetooth Headset</LI><LI>1 x USB Cable</LI><LI>1 x Audio Cable</LI><LI>1 x User Manual</LI></UL><!--Extra Info --><!--produts_compatibility -->