The air temperature can play a major role in the development of your plants. Keeping seeds, buds and fully grown plants in the right temperature is essential for proper growth and with the Computemp temperature recorder you can accurately measure the temperature and alert you when a pre-selected temperature is reached. The system also records the date and time for each high/low temperature over the previous seven days. The unit features a 9-volt battery backup that can last for three full days. Get readouts in Celsius, Fahrenheit or both alternately.