• DIGITAL DISPLAY: The digital display provides accurate temperature readings, making it easy to monitor and switch between cool and heat modes. Control temperature by setting the temperature set value and the differential value. Features temperature calibration, refrigerating control output delay protection, and alarm functions for temperature exceedance, temperature limits, or sensor errors. VERSATILE USAGE: This thermometer hygrometer is suitable for household and office environments. Features: • High-quality construction; compact and lightweight design; large, clear LCD display • Automatically switches between cooling and heating modes to maintain an ideal temperature range. Dual relay system supports Celsius display • Wide temperature range: -50°C to 99°C; dual heating and cooling functionality • Refrigerating control output delay protection with compressor delay protection • Temperature control via set point and differential settings Technical Parameters: 1. Temperature measuring range: -50°C ~ 99°C 2. Resolution: 0.1°C 3. Accuracy: ±1°C (-50°C ~ 70°C) 4. Sensor error detection delay: 1 minute 5. Power supply: 110-220VAC 50/60Hz, 12VDC, 24VDC (select at time of order) 6. Power consumption: <3W 7. Sensor: NTC sensor (1 piece) 8. Relay contact capacity: Two relays – Cooling 10A/220VAC; Heating 10A/220VAC 9. Ambient operating temperature: 0°C ~ 60°C 10. Storage temperature: -30°C ~ 75°C 11. Relative humidity: 20% ~ 85% (non-condensing) 12. Sensor cable length: 1.0m 13. Front panel size: 75x34.5mm Product size: 75x34.5x85mm Mounting cutout size: 71x29mm Menu Instructions: Code – Function – Setting Range – Default F1 – Temperature set value – -50.0~99.9°C – 10.0°C F2 – Differential set value – 0.3~10.0°C – 0.5°C F3 – Compressor delay time – 1~10 minutes – 3 minutes F4 – Temperature calibration value – -10.0°C~10.0°C – 0°C and high-quality model: STC-1000. Switches between cooling and heating modes. Control temperature by setting the temperature set value and differential value. Includes temperature calibration, refrigerating control output delay protection, and alarm function for over-temperature or sensor error.