Bluetooth 4.1Version?? high quality Bluetooth chip--clear stereo sound quality and stable signal transmission.</br>Upgraded Headset with TF Card Slot?? support 32GD Card?? Playing as a MP3?? need no any other mobile devices.</br>With FM function- as a Radio?? just need press the"" Key to switch?? easy to operate.</br>With sponge covers?? flexible neckband?? soft and comfortable wearing.</br>Durable polymer-li battery??provide playtime up to 5 hrs ??stand-by time 112 hrs??talking/listening time 6hrs.Micro-USB charging port??more convenient for charging.</br></br>Product Description</br></br><b>Egrd Bluetooth Headphone</b><br> This is the newest upgraded 3 in 1 H