... 32GB TF card.4.Sound design: Use best horn, ensure HI-FI acoustic. Use best decode chip, WAV original sound decode ... flash, it works normal. Red light flash, needs to recharge, after flash 1 min,headset shut off auto ... the battery is full of power. 7.Press on/off button, it shut off auto after 30s8.OEM are welcome. Best ... Fashion headphone 2012 with TF card