342634 Brand new and high quality Environmental friendly， safe， portable and reliable Easy to use Plug and play Can warm water， coffee， milk and other drinks Temperature can keep in 40-80 celsius degree Look no further， buy it now! Color: black Size: total diameter 110mm， warmer pad width about 65mm， wire length is about 950mm Operating voltage: 5V Working principle: adopt advanced heating material， power on and can quickly heat up， rise to a certain extent to maintain a constant temperature， the water temperature can be maintained at around 40-80 celsius degree Note: When the warmer works， do not directly touch the heating panel to avoid accidents. 1 x USB warmer In original package