• Powered by USB port, easy to install.
• No driver required.
• Plug and play with "on/off" button.
• Keeps drink cool and warm, cavity temperature can be -20 celsius degrees to 45 celsius degrees respectively.
• Durable ABS plastic.
• Compatible with USB 1.1/2.0.
• Rated power: 3.5W, energy saving.
• Diameter of heat plate: 63mm, suitable for most regular sized cups.