USB cup warmer Luminous USB clear cable: 1.5m 4-port USB hub Suitable for any type of cup Keeping coffee/tea/drink warm at 60 deg. C With power indicator, On/Off switch No risk of burning, with enclosure made of quality insulation material Easy installation, no driver required, plug-and-play 5V DC, 500mA Highly recommended as gifts or promotional items Keeping coffee/tea warm for any time interval Customers logos available