Heat pump. By applying a voltage potential to the device, heat will be transfer from 1 side to the other side causing 1 side to become cold and another side to heat up.

Rated voltage 12V
Lead length: about 30CM

TEC1
Rated current 6A or 16A
Maximum Temperature difference (Delta T) : 30 deg C
power is about 30W.
Plate dimension : 40mm * 40mm * 3mm

TEC2
Rated current 6A
Maximum Temperature difference (Delta T) : 70 deg C
power is about 65W.
Plate dimension : 40mm * 40mm * 8mm

Note : Delivery time within 4 weeks, please check back again as delivery time may be revise.