ELEGIANT Portable USB Heater Self Stirring Auto Mixing Tea Coffee Warmer Lid Milk Cup Mug Nominal volume: 130ml Product dimensions: 64x64x152mm In-set heating and warming function. Note: To restart charging, connect the USB interface on PC with the DC interface on mug through the USB cable. Package include 1 x USB Coffee Warmer 1x USB Cable 1X Instruction Manual