谢谢楼主mm。我女儿弹琴，天气冷了就用这个牌子的handwarmer。现在价格超好啊，有额外40% OFF。就是这款 https://www.amazon.com/OCOOPA-Rechargeable-Pocket-Sized-Handwarmers-Electronic/dp/B0CC189314?ref_=ast_sto_dp&th=1