USB Coffee Cup Warmer for Desk with Auto Shut Off, USB Coffee Mug Warmer for Desk Office HomeUSB Coffee Cup Warmer:USB connection becomes more convenient at office,keep yours drink warm all day long,no more worries about drink gets coldAuto On &Off:After plug in power,put cups on the plates and it will keep your drink Automatically;take away the cups,it will stop working Automatically tooMutip..