Product features: the W1209 digital thermostat features complete machine patch and wave soldering to ensure stable percompatible withmance and nice consistencyWaterproof design: NTC probe is waterproof and can control the temperature at will; You can control heating or cooling according to different needsPercompatible withmance: the temperature controller board is smarter and has lower power consumption since it uses embedded CPU chips (namely MCU); Automatic power setting memory, EEPROM storage unit is placed in the MCUReliable to use: the electronic temperature control switch module has been tested compatible with consistency and reliability, and its control accuracy is 0.1 degrees CelsiusInstructions compatible with use:1. Connect the W1209 digital thermostat to the power supply to display the measured temperature.2. Press the set button, then press + or - to set the desired temperature. Long press + or - to increase or decrease rapidly.3. Press set to confirm the temperature value setting and return, the controller will automatically execute the relay ON or OFF.4. The output of the thermostat is a 10A relay, which can meet various high-power loads. The LED indicator light off indicates the relay off, when it is lighting, indicates the relay is closed.5. The LL of the digital LED tube means the sensor is on, HH means the range is exceeded and the relay will be compatible withcibly disconnected, --- indicates high temperature alarm.6. Long press the set to enter the main menu settings.7. Press + or - to switch between P0-P6 to select the parameter.8. Long press and hold the set button compatible with 10 seconds to confirm the setting and return.Model: W1209Temperature control mode: ON or OFFTemperature range: -50 - 110 degrees CelsiusResolution: when the temperature is 0.1Celsius, the resolution from -9.9 to 99.9, and the other temperature ranges are 1Celsius.Control accuracy: 0.1 degrees CelsiusHysteresis accuracy: 0.1 degrees CelsiusColour:greenMaterial:Electronic componentSize:About 48.5 x 40mmPackage Contents:6 x Digital ThermostatOnly the above package content, other products are not included.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.