C.A.P. is no longer in business, we recommend going with an alternative, comparable replacement controller such as the Titan Controls Zephyr 1. The TMP-DNe allows you to control the temperature within your growing environment. You can set the day and night temperaute independently. The TMP-DNe can be set to either heat or cool. Just connect your equipment, then set the temperature that you wish to maintain. If the temperature varies from your setting, the outlet on the front is activated. The temperature differential can be set at 3, 5 or 7 degrees. Comes with a 12'' remote sensor. The TMP-DNe is rated for 15 amps @ 120 volts. • The TMP-DNe is selectable to run heating or cooling equipment. • The TMP-DNe has an adjustable differential to maintain the level of temperature control that you want. • The 12’ External Temperature Probe is highly accurate & reliable. • The TMP-DNe can control different Day and Night temperatures. • The TMP-DNe is extremely affordable way to control the temperature in your growing environment. Instruction Manual