SODO MH3 Wireless Headphones with NFC & Flip-out Loud Speaker it comes with Powerful Bass Super Stereo Sound Effect: 40mm large dynamic alloy speaker drivers, Excellent Deep Bass & Stereo Sound Output Performance, enjoy high quality music two different ways. Multiple modes of connection help you enjoy your music better it supports Bluetooth 3.0 , aux in, FM radio, TF card and NFC. Easily Foldable to make into a Speaker or a pair of Headphones. On Sodo MH3 Bluetooth 2 IN 1 Headphone, the finest materials were applied like leather cushion head-pad makes it perfect for long-time wearing as well as noise isolation.  Headband is designed to be adjustable so it could fit different head size. It lasts 6 hours in headphone mode, 3 hours in speaker mode, 8 hours talking time and 23 hours standby time.  No need to charge every step of the way, it will last along the way. Noise Cancelling. Comfortable Wearing Design   Be it an iPhone, Samsung, HTC, LG, Sony or other android smartphones, you can connect Sodo MH3 with them   effortlessly and start enjoying your favorite music in no time.How to use Bluetooth Function In this mode The FM signal is Cut-of .The indicator lights will alternatelybink between blue&red indicating Bluetooth mode is ready for pairing.Use a Bluetooth enabled audio player or cellphone to search for the Bluetooth pairing name MH3 being transmitted by the headphone.Once paired , play the music on audio player /cellphone and it will be heard on the headphone unit.