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This hot pen is designed for using in the cold environment even in Antarctic. There are a resistance heater and a rechargeable battery inside the pen. When you turn on the power switch, the resistance heater will start to fever so that your hand can be warm even in low temperature. The heat can also prevent the ink from freezing and you can write more conveniently.
Jian Chen，Mingming Wang, Kunpeng Wang，Xiumin Lin，Hanchao Li，Yang Li，Lingyan Xie，Jingwen Yu，Yuan Gao，Peinv Xu，Yiyun Xu ，Pan Wang