Digital Temperature Controller with a 3-digit LED display, extremely ;100% complete machine , wave soldering, stable performance, good consistency Temperature Measurement Range: -50-110. Control accuracy is to 0.1 degrees Celsius. Has passed stability, consistency and reliability testing Embedded CPU chip (MCU), more intelligent, lower consumption. Automatic set memory (MCU -in EEPROM memory unit). Specifications: Refresh Rate: 0.5s;Input Voltage: DC 12V;Hysteresis Accuracy: 0.1;High Temperature Protection: 0 - 110 Measurement Input: NTC (10K 0.5%) Waterproof Sensor;Measurement Output: 10A relay;Resolution: When temperature is 0.1, the resolution is -9.9~99.9, other temperature segment is 1;Static Current: Less than 35MA, attract current less than 65MA Function Setting Long press the "SET" button to enter the main settings, press " + or - " to switching between P0-P6. 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; Default: 0 P5: Delay Time; Range:0-10 Minute; Default: 0 P6: High Temperature Alarm; Range:0-110; Default: Off colour: green + transparent Material: acrylic + electronic components size: 48mm x 40mm x 14mm Package Contents: 4 * W1209 12V DC Digital Temperature Controller Board 4 * Acrylic Box Tips:When Temperature controller is powered off, long press "- or +", you can restore the factory settings Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.