Easy to use, plug and playON/OFF switchNo need of using driverUSB powered, no need of batteriesKeep the heat of coffee, tea or beverage at about 50- 60℃on/off switch with a Red Led indicator when warmer is turned onPlastic and porcelain cup is not accepted in use of warmer. Steel cup is recommendedColor: silverWeight:65gSize: 10*9.3*2cmUSB cable: 92cmRated voltage: 2.5W-5V DCCompatible: PC, Laptop etc.Connector: USB 2.0