Complete machine patch, wave soldering, stable performance, good consistency. Embedded CPU chip (MCU), more intelligent, lower power consumption. Automatic power set memory (MCU built-in EEPROM memory unit). Control accuracy of 0.1 degrees Celsius. Tested for stability, consistency, and reliability. Specifications: Model: W1209 Temperature Control mode: ON / OFF Temperature Range: -50 to 110 degrees Celsius Resolution: 0.1 degree from -9.9 to 99.9, 1 degree for other temperature segments Control Accuracy: 0.1 degree Hysteresis Accuracy: 0.1 degree Refresh Rate: 0.5s High Temperature Protection: 0 to 110 degrees Celsius Supply Voltage: DC 12V Static Current: Less than 35mA, pull-in current less than 65mA Output Voltage: DC 12V Output Power: 20A relay Measurement Input: NTC (10K 0.5%) Waterproof Sensor Environmental Requirements: -10 to 60 degrees Celsius; Humidity 20% to 85% Color: Green Material: Plastic + Metal Size: 48.5 x 40mm Package Contents: 1 x Digital Temperature Controller 1 x Shell Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowed error is +/- 1-3cm.