Chip model: TEC1-12706External dimension: 40*40*4.0mm element log 127Internal resistance: 2.1~2.4 ohm (ambient temperature 23 – 1 DEG C, 1kHZ Ac)Maximum temperature: T max (Qc=0) 67 DEG C.Operating current: Imax=4.3-4.6A(rated 12V)Rated voltage:12V (Vmax:15V starting current 5.8A)Cooling power: Qc max 60-72WWorking environment: temperature range -55 degrees C ~ 150 C (high ambient temperature drop directly affect the efficiency of refrigeration)