usb warmer, 1support windows95/98/ME/XP 2no driver required ,plug and play 3CE,ROHS are optional OEM,ODM ,LOGO ... version.Individual port over-current protection.USB powered, easy installation, no driver required, plug and playKeeps drink cool and warm, cavity temperature ... produced and exported all kinds of usb warmers for 9years 2010 ! Newest ! 220V animal shape coffee warmer with usb hub ...