ABOUT THERMOSTATS The BHT-009 range has been developed to control electric underfloor ,water heating or water/gas boiler system. These units are designed for use in commercial, industrial, civil and domestic properties.GA for water heating;GB for electric heating;GCfor gas boiler; Thermostat 1pcScrews 2pcUser Guide 1pcQC Passed 1pc Floor Sensor 1pc (Floor Sensor is Optional) TECHNICAL DATA Current Load: 5A (water heating, waterlgas boiler),16A (electric heating)Sensor: NTC3950, 10KNetwork: ZigBee / Wi-FiApp: Smart life/Tuya Accuracy: ±1°CSet Temp. Range: 5-35°CRoom Temp. Range: 5-70°CDisplay Temp. Range: 5 ~ 70°CAmbient Temp.: 0~ 45°CAmbient Humidity: 5 ~ 95 % RH (Non Condensing)Storage Temp.:-5~ 45°CPower Consumption: <1. 5WTiming Error: < 1%Shell Material: PC +ABS ( Fireproof)Installation Box: 86 * 86mm Square or European 60mm Round BoxWire Terminals: Wire 2 x 1.5 mm2 or 1 x 2.5 mm2Buttons: Capacitive Touch Buttons