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USB powered, no batteries needed.
Plug and Play, no need to install extra driver.
Easy installation and easy operation.
Keep your hot coffee, tea, or other beverage warm, temperature range: 40 centigrade to 80 centigrade
Perfect for home and office using.
Working voltage: 5V
Item size: approx. 13 * 11 * 2.5cm / 4.3 * 4.3 * 1in