... according to customer's requirement. 1.Reader function: plug in TF card, con- nect to computer by USB ... , it can work more than 15h.3.Play type: MP3,WMA,WVA format, maximum capacity 32GB TF ... to recharge, after flash 1 min,headset shut off auto. Charging, red light keeps flashing, light stop, the ... .Press on/off button, it shut off auto after 30s.8. OEM are welcome Foldable Wireless plug-in card headset