Factory seal has not been broken! Brand new never used.

Thermoelectric Temperature Controller printed circuit board provides PWM (Pulse-Width-Modulation) regulation of cooling and heating output for TEC

Provides PWM (Pulse-Width-Modulation) regulation of cooling and heating output for TEC units

Automatically switches between cooling and heating

4 cooling temperature set points range from 22.5 C to 35 C (35 C Factory Setting)

3 heating temperature set points range from -5 C to 15 C (15 C Factory Setting)

Heating function can be easily disabled if desired

On-board LEDS indicate low temp, high temp alarm, and overall system status

Dry contact relay output provides for external alarm indication