[Constant [104~113℉ (40~45℃)], [113~122℉ (45~50℃)], 122~131℉ (50~55℃)], 3 levels of temperature can be adjusted to warm your hands in the cold winter. 【Lightweight & Smooth Surface】 Pocket size(112 64 33mm), comfortable and small, suitable for your hands to hold.
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