... Temperature 40-45 4,Input power 3w introductionName,usb warm coffee cupMeterial, SBR CR,carbon fiber,denim,lithium battery Input power ... USB 5V Temperature,40-45 SIZE,30*9cmSpecificationsusb coffee cup set,usb heater,usb coffee cup warmer. In-set Li battery. Use ... portably. Can recharge repeatly Magnetic waterCompatible with PC hardware usb coffee cup