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.
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