Winter Hand Warmer Portable Silver Heater Heating Equipment for Ice Fishing Specifications: With a luxurious, elegant, and fashionable design, it is a good product for the new type of cold protection. Long-life design supports long-term use, which is strong and durable. There are 21 heat dissipation holes on the front and back sides, and 5 vent holes on the upper, maintaining a constant temperature and heat. The heating time is long and the heating temperature is balanced. Without open flame, this product is safe for you to use at ease. This product is convenient to carry for outdoor, home, or office with a small size and a light weight. It is a good choice for winter fishing enthusiasts, the elderly, pregnant women, and children. Steps for Usage: Open the upper cover of the warmer, pour the special oil into the funnel, and add the oil to the oil injection port. Cover the burner, use a match or lighter to heat and ignite the catalyst cotton on the burner for about 3-5 seconds. Cover the heat dissipation cover, put it in the special bag, and place it on any place on the body that needs heating. Precautions: Do not pour oil directly on the platinum burner to prevent accelerated aging damage. Do not fill too much oil to avoid waste. One time oil filling can be burned for 24 hours. Please use it as soon as possible after filling. When it needs to be stopped halfway, please remove the furnace head and place it carefully. Prevent contact with water to avoid being unusable next time. Item Name: Hand Warmer Material: Engineering Metal Features: Durable, Practical, Convenient, Long-lasting Heating Size: 6cm x 10cm x 1cm/2.36" x 3.94" x 0.39"(Approx.) Note: The product contains no oil. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension differences due to different manual measurements. Package Includes: 1 x Hand Warmer(Not Included Oil)