External dimensions: 40*40*3.75mmInternal resistance: 2.1~2.4? (ambient temperature 23?1?C, 1kHZ Ac test)Large temperature difference: ?Tmax (Qc = 0) 67 ? C or more.Working current: Imax=4-6A (when rated at 12V)Rated voltage: 12V (Vmax: 15V starting current 5.8A)Cooling power: Qcmax50-60WWorking environment: Temperature range -55 ?C ~ 83 ?C (excessive ambient temperature drop directly affects cooling efficiency)Packaging process: four weeks standard 704 silicone rubber seal