Features: 1Working Principle: When there is a temperature difference between the two ends of the thermoelectric power generation module the modified module can generate continuous DC electric energy and the greater the temperature difference between the two ends of the module the greater the DC electric energy generated and the higher the thermoelectric conversion efficiency. 2Improve Thermal Conductivity: When in use paste flexible graphite heat transfer paper with high temperature resistance and good thermal conductivity at both ends of the module which can improve the thermal conductivity of the module and improve the efficiency and durability of the device. 3Applicable Scenes: Thermoelectric generator can be used for power generation cooling or heating applications. These modules are specially manufactured for power generation but they can also be used for cooling or heating applications. 4Specially Designed: Thermoelectric power generator is specially designed for power generation of thermal enterprises. 5Reliable Performance: SP1848 27145 TEG peltier modules are far superior than standard peltiers for power generation applications. Specification: Item Type:ThermoelectricPowerGeneratorMaterial: SemiconductorWeight: Approx. 24g / 0.8ozModel: SP1848 27145Wire Length: Approx. 300mm / 11.8in (3mm)Operating Temperature: -40 ~ 120Generator Size: Approx. 40x40x4mm / 1.6x1.6x0.2inThe side with words is close to the cooling surface (cold end)The wordless side is pasted on the heat absorbing surface (hot end)The red wire is connected to the positive pole and the black wire is connected to the negative pole. It can generate electricity when there is a temperature difference Package List: 1 x ThermoelectricGenerator