Prerequisite 1: The rated power of the extension cord ≥ the maximum power of our heating product. Prerequisite 2: The extension cord is a UL-listed product, not a cheap, uncertified product. When is it not recommended to plug in a surge-protected extension cord? ① When the extension cord is aging, has burn marks, or is loose, increasing the risk of fire. ② When other high-power products are connected to the extension cord, exceeding the extension cord's capacity.
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