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Any 5V/1-2A USB outlet can supply power to our eye mask. 5V is a safe voltage without the electric leakage problem. The controller provides 5 levels of temperature from 98.6℉ to 125.6℉ and 6 classes of timing from 10 to 60 minutes. It is easy to adjust hot level and timing with the LED display controller. The length of the cord is around 30 inches.







