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【Cardboard Heater】The biting cold wind is replaced by warmth like spring. Compact and portable, heats up with just one button press, offers three temperature settings, and is energy-efficient and gas-saving. Certified for safety, explosion-proof and leak-proof, ideal for both outdoor use and home use. Say goodbye to the cold, embrace comfort, and let warmth follow you. A choice of quality and trustworthiness.