Comfortable Sports Mp3 Player Wireless Headset Headphones Fm Earphones Auriculares Support Micro Sd Tf Card Player Neckband Sports Earphones, comfortable headphones Music Earphones for jogging, never delay to exercise your body MP3 Player, 3.5mm connector, Built-in FM function and TF/Micro SD card slot. Built-in rechargeable Li-PO battery, long running time Size:120X160X50mm(LxWxH), that is 4.7X6.3X2inches, sell in 1 piece only