1、Mini and light weight design. Large and clear LCD display screen. 2、Dual heating and cooling functions, automatic over‑temperature alarm. Control the temperature by setting the temperature setting value and different values. 3、The mini temperature controller is an excellent and convenient multi‑function device for controlling the temperature of the aquarium. The stability of aquarium temperature is one of the key factors to promote fish healthy and safety. 4、By using the temperature controller, you can provide the best temperature environment for your fish. This advanced temperature controller can measure and control temperatures from ‑50 to 90℃ 1 x Temperature Controller1 x Instruction Condition: 100% brand newItem type: Temperature ControllerMaterial: ABS flame retardant plastic caseColor: As picture shownWeight: Approx. 130g Power supply voltage: 110-220VAC ± 10%, 50/60Hz (or DC12V / DC24V)Measuring and controlling temperature range: -50℃～+110℃Resolution: 0.1°CAccuracy: ±1℃Accuracy: ±1℃Relay output contact capacity:Heating: 10A/240VAC,Cooling: 10A/240VCASensor h type: imported NTC sensor, cable length 1m/ 3.3ftDescription:P 0. Cooling and heating modePlease set to C for high temperature start as cooling modeLow temperature start is heating mode, please set to HP 1. Hysteresis settingIn heating mode (H): the measured value ≤ the set value-when the hysteresis starts to output the heating to the set value and stops.In the cooling mode (C): when the measured value ≥ the set value + hysteresis, the output cooling is started and the set value stops.P 2. The highest setting range: the highest value does not exceed this value when setting the temperatureP 3. The lowest setting range: the lowest value when setting the temperature is not lower than this valueP 4. Temperature correctionWhen there is a deviation between the measured temperature and the standard temperature, you can use this function to correct. The corrected temperature = the temperature before correction + the corrected value.P 5. Delay start time unit: minuteWhen controlling the refrigeration of the compression engine equipment, the delay time can be set according to the needs. The equipment will not start immediately when the controller is output, and it needs to start after the set delay time is run.P 6. High temperature alarmWhen the measured value is greater than this value, the screen displays --- and an alarm will sound, and the output will be forcibly disconnected.P 7. Data lock functionTurn on the data lock to keep the current setting unchanged. At this time, the set temperature and function are invalid. If you need to modify it, you need to turn off the data lock function.P 8. Restore factory settingsLong press SET to switch to P8, press SET once to set to on, press for Rst to restore factory settingsYou can also press and hold the +-key and hold the power-on self-test and restore factory settings.Instructions for usePlease connect the power supply according to the parameters and wiring diagram, and connect the cooling or heating equipment to the output terminal.Enter the internal settings to select heating (enter P0 to select H) or cooling (enter P0 to select C) mode as needed.Setting temperature method: press Set once and the screen flashes, press up and down to set the desired temperature, press for Rst to confirm and return to the OUT indicator of the panel: flashing indicates the delay of cooling or heating start, and constant light indicates outputNixie tube: display LLL for open circuit of the sensor; display for HHH for exceeding the measuring range and the thermostat will be forced to power off; display --- for high temperature alarm.