This controller box with DN300A has a lot of good features:

• You can calibrate the temperature at 9 degrees in each direction to make sure it’s where it needs to be.
• It has hot and cold audible alarms.
• Has a 0-999 minute timer with 2 types of setting timer 
• Switch between C/F
• High temperature limit of 572F
• Adjustable hysteresis from 1-30 degrees.
• Fast response long L shape sensor doesn’t expose the wires to direct heat and keeps the leads from melting on the metal.
• equipped with Circuit breaker 15Amp instead of short life fuse
• Heat and cold configurable for other applications

This thermostat simply turns off the Heater or cooler when it reaches the specified temperature.

We will ship the temperature controller with 110 V or 220 V versions based on the voltage of your country. For example, if you are customers from the United States, Canada, Mexico, Japan, Venezuela, and Taiwan, we will ship 110 V versions. For customers from Europe, Australia, New Zealand, most Asian Countries, South America and Africa, we will ship 220 V versions.

Features

• Mini and light design
• Large and clear LCD display
• Temperature Range -30 ~ 300 °C (-22 ~ 572 °F )
• Dual heating and cooling function  
• Control temperature by setting the temperature set value and the different value
• Temperature Calibration  
• The wiring diagram for installation included

Temperature Controller Specifications

• Temperature Measuring Range: -30 ~ 300 °C (-22 ~ 572 °F )
• Control temperature range: -30 ~ 300 degrees (adjustable)
• Control temperature difference: 0.1 - 25 degrees (adjustable)
• controlling Resolution: 0.1 degree
• Timer : 0-999 minute
• Sensor error delay: 1 minute
• Circuit breaker  capacity (Heating or cooling): 15 Amp  
• Compressor delay protection time: 0 ~ 10 minutes (adjustable)  
• Storage Temperature: -30 ~ 75 °C
• Operating Relative Humidity: 20 ~ 85 % (No condensation)  
• Power Supply: 100-120 V AC/DC (depends on your country)
• Power consumption: < 2 W
• Cable length: 3 m (near to 10 feet)
• Equipped with AH or AL buzzer alarm (Higher or Lower temperature alarm setting) 

 Temperature Sensor Specification

• Measurement range: -30 ~ 300 °C (-22 ~ 572 °F )
• Cable length (L): 10 ft (3m)  
• Sensor type: NTC sensor (100K)

       Notes for customers outside North America,

• For international orders, a US power cord is included. Users can cut the plug and socket wire and change it to the power plug and socket outlet that meets the local standard for the input and output.  

Assembly kit Video