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Power supply mode:USB,Rated voltage:3.8,Rated power:5,Heating method:Aluminum Heat Dissipation Type,Types of Hand Warmers:Hand Warmer,Brand:Fumade,Model Number:FM01,Packaging volume:110*50*135mm,Color:Yellow 5000mAh, Pink 5000mAh, Blue 5000mAh, Yellow 10000mAh, Pink 10000mAh, Blue 10000mAh,Main downstream platforms:Amazon, Wish, AliExpress, Independent Station, LAZADA,Main sales regions:Japan, South Korea, Europe,We have authorized private labels available:yes,Is it exclusively for cross-border export supply?:yes,Does it have a built-in battery?:Built-in battery,Built-in Battery Capacity:4000mAh-6000mAh included,Product Net Weight:300g,Is it a patented source product?:No,Battery life duration:8-12 inclusive,Product Category:Hand Warmer