Won Brothers Pro Heat D-58 controller

Max safe output: 800 watt 

2-Seperate digital display (water temperature / set temperature) 
Dual scale display (°F or °C) 
Precision (±1.8°F / ±1°C) 
Control range (32°F to 104°F / 0°C to 40°C) 
Auto electronic control 
Ideal for aquarium, pond, electro-plating, industrial field 

Conversion Fahrenheit and/or Celsius  
Push up button once to convert Fahrenheit to Celsius or push up button again to convert Celsius to Fahrenheit 
 
WATER TEMPERATURE
 
Water temperature will be shown automatically with Fahrenheit when green light indicates °F or with Celsius when green light indicates °C
 
HOW TO SET TEMPERATURE 
Push set button for a few seconds until set temperature display begins blinking of numerals continuously 

Set temperature by pushing up button or down button.  Each button push will either increase or decrease temperature by 1 degree increment 

After setting temperature desired push set button once again.  Note that automatic "SET" temperature has been fixed at 78 °F (20°C) 
 
ON / OFF INDICATOR LIGHT 
ON / OFF indicator light will be red until desired set temperature is reached when an actual water temperature is lower than set temperature. 

When desired 'SET' temperature is reached, the ON /OFF indicator will not be illuminated. 

If water temperature drops below desired 'SET' temperature, the heater will automatically turn on to heat water (ON /OFF indicator light will be red) 

For the automatic heater to regulated water temperature to the desired 'SET' temperature, the heater must remain plugged into a wall outlet with electrical power 

Note that converting 'SET' temperature from C to F will create a 1F reading discrepancy with water temperature reading 
 
SPECIFICATION 
 
Temperature control range: 0°C to 40°C (32°F to 104°F) 
Temperature measurement range: 0°C to 70°C (32°F to 158°F) 
Precision: ±1°C (±1.8°F) 
Voltage:115 volt, HZ: 60 HZ, Amps: 10A 
Max. Load: 800 watt 
Temperature display: 3 digit (display down to one place of decimal) 
Setting temperature display: 3 digit (not display down to one place of decimal) 
Sensor (probe) cord length: 6 feet 
Indicator light: heater ON / OFF (ON is red light) 
Conversion of reading in °C or °F: Green light 
Resolution for water temp: 0.1°C / 0.1°F 
Resolution for set temp: 1°C / 1°F 
 
CAUTION  
Avoid an excessive temperature, humidity, shock and direct sunlight. 
When switching on the electric power after power is off, make sure your set temperature has been changed or not.  This controller's automatic set temperature has bee fixed at 78°F (26°C) 
Keep the controller away from the high voltage or motor