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【Operational safety】Thermoelectric peltier is high reliability and no pollution, it is sufficient and safe 【Easy To Move】Thermoelectric Power Module is easy and convenient to carry move for its lightweight material 【Durable】Cooling peltier plate is made of high quality material which is and compact, it can prolong the product service life 【Working principle】The red wire is connected to the positive electrode, and the black wire is connected to the negative electrode. It generates electricity, when the temperature difference occurs 【Package Content】You will get 1pcs brand new high quality material thermoelectric power generator