How to Use: 
Connect the power supply and the load, then you can supply to the controller. 
It displays the measured temperature, press SET key, the display temperature flashing, press"+" "-" to set the desired temperature. After finished, press SET to confirm and back. 
Now the controller automatically performs the relay by setting off.  
This temperature controller output is 10A relay, meeting various high-power loads, please make sure the wires are connected correctly. 

Indicator, LED State Instruction: 
Indicator: OFF indicates the relay is switched off; ALWAYS indicates the relay is closed. 
LED: shows LL means the sensor opens; shows HH means it's out of range, the thermostat will be forced to close the relay, the display --- as high temperature protection. 

Specifications: 
Temperature Range: -50~110°C 
Resolution: 0.1°C(-9.9~99.9°C), 1°C(Other Ranges) 
Accuracy: 0.1°C 
Refresh Rate: 0.5s 
High Temperature Protection: 0~110°C 
Input Power: DC 12V 
Static Current: ≤35mA, Attract Current: ≤65mA 
Measurement Input: NTC(10K 0.5%) Waterproof Type Sensor 
Output Range: 1 Channel 10A Relay Output 
Environment: -10~60°C， Humidity: 20%-85% 
PCB Board Size: 48 * 40mm / 1.9 * 1.57in  

Package List:
1 * XH-W1209 Digital Mini Thermostat