This temperature chamber will heat or cool to a preset temperature. The temperature controller uses a thumb-wheel to adjust the temperature setting and it needs cleaned as it has trouble maintaining the setpoint - or you could replace the controller with a new one. The label on the unit says -40C to 180C. I know that it has trouble getting down to -40C. We have never run it over about 100C so we don't know about the upper limit. The box is about 1 ft cube. It is 110V powered and you can have the cart it is sitting on.