Feature: 1. HIGH ACCURACY: The high accuracy probe of the controller ensures the measurement accuracy and the error value is small, which is very suitable for places where constant temperature is required. 2. STABLE PERFORMANCE: The controller adopts wide voltage power supply, even if the voltage is unstable, it can work normally. 3. ABS HOUSING: The ABS material of the socket shell has strong insulation, which can ensure the safety of the socket without leakage. 4. EASY TO USE: The thermostat can be use after plug in circuit, supports readings in Celsius, which is convenient and practical. 5. WIDE APPLICATION: The controller can be used in fish tanks, aquariums, seedlings, greenhouses, floor heating, electric heating beds, electric blankets, electric fans, fermentation, planting, preservation, experimental ovens, etc. Specification: Item Type: Temperature Controller Material: ABS Model: QS WK16026 Display: LED digital tube Temperature Measurement Range: -9℃-99℃ Control Accuracy: 1℃ Measurement Accuracy: ±0.1℃ Resolution: 0.1℃ Refresh Rate: 0.5 seconds Temperature Calibration Range: (+/-)9℃ Measurement Input: NTC (10K0.5%) air sensor Output: Relay 10A single load Quiescent Current: Less than or equal to 40mA Suction Current: Less than or equal to 65mA Working Environment: -10℃-60℃, humidity 20%-85% Working Mode: Heating or Cooling Mode Measurement Input: NTC (10K0.5%) waterproof sensor Power Cord Length: Approx 150cm / 59in Output: Relay 10A all the way Environmental Requirements: Temperature from -10℃ to 60℃, humidity from 20% to 85% Power Consumption: Quiescent current 40MA, attracting current ≤65MA Instruct: Start Light: The device starts to work when the red light is on. Stop Lights: When the red light goes out, the device stops working. Digital Tube: The actual temperature is displayed in the middle of the red digital tube, the left side of the yellow digital tube displays the set temperature for startup, and the right side of the yellow digital tube displays the set stop temperature.Calibration Error: Press stop when the product is in power off state. The error value is displayed in the middle of the nixie tube. Press and hold to start adjusting numeric values. The maximum is 9, the minimum is minus 9. When the temperature exceeds 99℃, the nixie tube shows HHHHHH. When the temperature is below -9℃, the nixie tube displays LLLLLL. When no sensor is detected, nixie tube displays EEEEEE. . Package List: 1 x Temperature Controller1 x Instruction