Yeeco High Power TEC Thermoelectric Cooler Generator Cooling Peltier Plate Module Thermostat Cooling Controller DC 12V 40mm40mm Internal resistance: 4.0 ~ 4.3 (ambient temperature 23  1 C, 1kHZ Ac testing) Maximum temperature: Tmax (Qc = 0)&gt; =60 C Working current: Imax = 12A (rated voltage startup) Rated voltage: DC12V (Vmax: 15.5V) Mounting pressure: 85N/cm2