ITEM NAME:2x W1209 12V DC Digital Temperature Controller Board Mini Electronic Temper J2J3 2x W1209 12V DC Digital Temperature Controller Board Mini Electronic Temper J2J3 100% Brand new and high quality W1209 12V DC Digital Temperature Controller Board Waterproof Electronic Temperature Temp Control Module Switch with 10A One-channel Relay. When the Thermostat is power off, long press "- or +", you can restore the factory settings Color: Green Material: metal Size: 48.5*40mm Instructions for use: Connect the power supply and equipment, the measuring temperature is displayed, press the "SET" button, press "+ or -" to set the desired temperature (long press "+ or -" to quickly increase or decrease), press "SET" to confirm the setting and return, controller automatically performs the relay ON/OFF. the thermostat output is 10A relay, meet a variety of high-power loads. LED Indicator: LED off indicates the relay off; Lighting, indicates the relay is closed. Digital LED Tubes: "LL" indicates sensor open, "HH" indicates overrange, the relay will be forcibly disconnected; "---" indicates high temperature alarm Long press the "SET" button to enter the main menu settings, press "+ or -" to switching between P0-P6, then long press "SET" or 10 seconds without keystrokes to confirm the setting and return. Buttons: P0 :Cooling / Heating; Range: C/H; Default: C P1 :Hysteresis Setting; Range:0.1-15; Default: 2 P2 :Highest Setting Limit; Range:110; Default: 110 P3: Lowest setting Limit; Range:-50; Default: -50 P4 :Temperature Correction; Range:-7-7 Celsius; Default: 0 Celsius P5: Delay Start Time; Range:0-10 Minute; Default: 0 P6: Key Tone Switch; Range:0-110; Default: Off Package Included: 2x W1209 Digital Temperature Controller Board Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Press "+ or -" to set the desired temperature (long press "+ or -" to quickly increase or decrease). LED Indicator: LED off indicates the relay off; Lighting, indicates the relay is closed. the relay will be forcibly disconnected; "---" indicates high temperature alarm.