... /movement MP3 player/ running wearing/headphones for wireless headset /TF card/timbre1,system:Windows98/2000/XP2,USB:USB 2.0 ... , is card type, the biggest support 8 GB, adaptation TF card/micro sd card4, charging power supply: computer USB port ... noise ratio: > 85 db9, working environment temperature: centigrade 0 ° C-45 ° C Card headset/movement MP3 player/ running wearing/headphones for wireless ...