1.with heat sink and fan . 2.using longer working life peltier module. 3.special waterproof structure. 4.more convenient . typeCool unitedimension(L×W×H)size of Al chip(L×W×H)70×70×27mm44.5×44.5mmCooling modeHeat sink and fanInsulation compressionAC1200V,1secindInsulation resistanceDC250V,more than 10MΩ Largest use voltageDC ±12 V Maximum current6.0 AMaximum heat(test value)46 W(T:0°C, Tc=Th=50°C ...