Features:  1.100% complete machine chip, wave soldering, stable performance, good consistency.  2. Embedded central processor chip (MCU), more intelligent, lower power consumption.  3. Power-off settings automatically memory (MCU built-in EEPROM storage unit).  4. The control accuracy of 0.1 degrees Celsius.  5. Hysteresis 0.1 from the set, you can control the decimal (0.1-15.0).     Specification:  Temperature control range: -50 ~ 110 ­°C.  Resolution: -9.9 ~ 99.9 when the other temperature of 0.1 ° 1 °.  Temperature measurement accuracy: 0.1 ­°C.  Control accuracy: 0.1 ­°C.  Hysteresis accuracy: 0.1 °.  Refresh rate: 0.5 S.  Input power: DC 5V, DC 12V, DC 24V.  Measurement input: NTC (10K 0.5%) Waterproof sensor.  Output: 1 relay output, capacity = 20A 125VAC, 20A 14VDC.  Environmental requirements: -10 ~ 60 ° Humidity 20% -85%.  Specifications Size: 48.5 * 40mm.  Total power consumption: Quiescent current: ≤ 10MA Pull-in current: ≤ 65MA.     Usage:  - Press the + button to set the desired temperature (press and hold + - to move up and down quickly) Set the temperature of the display.  - Press SET to confirm the completion of return, then the controller automatically by setting the relay off The Thermostat output for the 20A relay to meet a variety of high-power load, connect the control circuit, you can supply power to the thermostat, this display shows the ambient temperature.  - Indicator: Flashing indicates the cooling or heating start delay. If the indicator is on, it indicates that the relay is closed.  - Digital control: display LL sensor is open, please follow the instructions to connect the sensor; display HH is outside the measuring range will force the relay to disconnect the thermostat; display high temperature alarm.     Package Included:  5 x Temperature Controller