Promotion gift Card MP3 Player 1.MP3,WMA,WAV Media format 2.Built-in rechargeable battery 3.full-color Logo 4.CE,FCC,RHOS promotional gift card MP3 playerPromotional gift Card MP3 Player •Media format: MP3, WMA, WAV•Each with an earphone and a cable•Battery: Built-in Rechargeable lithium-ion polymer•Interface: USB2.0 high speed •Working humidity: 20% ~90%(40C)•Storage humidity: 20% ~93%(40C)•Size ...