Features: 1) It is a cup warmer with 4 ports USB1.1 hub 2) Can maintain the beverage around 50-60¡£C 3) Very easy to install 4) No driver required 5) No batteries needed 6) Can also hot plug 7) On/off switch and LED indicator 8) You could also use the transformer to power it (2.5W-5V DC) 9) Top-quality insulating material was used around the metal plate
in order to avoid be burn