Overview: The thermostat will provide uniform and comfortable temperature control throughout every room in your property. We bring together technology, craftsmanship and the highest quality materials to provide you with a safe, reliable product combined with sleek, contemporary design. The smart thermostat has been developed to control electric underfloor, water heating or water/gas boiler systems. These units are designed for heating control in commercial, industrial, civil and domestic properties. Note: 1. Model: HC-020-EWL-GA, HC-020-EWL-GB, HC-020-EWL-GC, GA is for water heating, GB is for electric heating, GC is for water/gas boiler. 2. Please read the user manual carefully before installing and operating the thermostat. 3. APP prompts E2, which means external sensor is needed. The normal use will not be affected if the sensor is not installed, and the detection data will be more accurate if installed. Specifications: Model: HC-020-EWL-GA, HC-020-EWL-GB, HC-020-EWL-GC (Optional) Type: Thermostat for Water Heating/Electric Heating/Boiler (Optional) Power Supply: 95-240V AC, 50/60Hz Current Load: 5A (water heating, water/gas boiler); 16A (electric heating) Sensor: NTC Display: LCD with Backlight Buttons: Capactive Touch Buttons Accuracy: 0.5 or 1 Set Temp. Range: 5~35 Dispaly Temp. Range: 5~99 Ambient Temperature: 0~45 Ambient Humidity: 5~95 % RH (Non Condensing) Storage Temperature: -5~45 Power Consumption: <1.5W Timing Error: <1% Protection Class: IP20 Shell Material: PC+ABS (Flame Retardant) Color: Black, White (Optional) Item Size: 87*87*43mm/3.42*3.42*1.69in Item Weight: 132g/4.65oz Package List: 1 * Thermostat 2 * Screws 1 * User Manual(English)