1.USB warmer ,USB gift 2.USB Powered,no batteries needed 3.On/Off switch& LED indicator 4.CE,ROHS 5.Keep coffee/tea warm USB warmerUSB Cup warmer with 4 port usb hubDescription:1. Keep coffee/tea/drink warm at 50-60temperature2. USB Powered,no batteries needed3. On/Off switch& LED indicator 4.Quality insulation material around the metal hot plate prevents burns5.USB line length:1-1.5M,working ...