USB Warmer For Coffee

We are offering usb warmer for coffee, milk, tea and other beverage with 4 usb hubs. manual on/off for heating led is red when heating restriction edge to avoid cup sliding, suitable for cup diameter within 7.6cm keeping coffee, tea and milk at the temperature of 45 to 60 degrees centigrade 4 usb output ports to support usb2.0 and 1.1 version devices, data transferring speeds: full speed is 480mbps, mid speed is 12mbps and low-speed is 1.5mbps