Thermoelectric or Peltier Modules are devices that are designed for thermal transfer using the Peltier effect. As current passes through the junction between two ceramic substrates, heat is produced on one side of the junction and absorbed on the other side. A heatsink is recommended for the hot side of the module. The characteristics are Qmax @ Th, Delta Tmax @ Th, current max, voltage max, resistance, and operating temperature.