BHT-101 Knob Thermostat For Water Heating/Boiler/Electric Heating Features 1. The ultra-thin embedded panel perfectly fits all kinds of walls; The visiable thickenss above the wall is only 12.4mm. 2.Compatible with standard 86mm square cassettes and 60mm European cassettes to meet all installation environments; 3. Strict temperature control accuracy (± 1°C) to provide the warmth you want;   Technical Data Power Supply:95~240 VAC,50~60Hz or 24V DC/AC,50~60Hz Please check the information laser printed on the back of the thermostat for the actual voltage. Current Load: 5A (water heating,waterlgas boiler), 16A (electric heating) Sensor:NTC3950,10K Accuracy:±1℃ Set Temp. Range:0-35C Ambient Temp.: 0~ 45°℃;Ambient Humidity:5~ 95 % RH (Non Condensing) Storage Temp.:-5~45C Power Consumption:<1.5W Timing Error:<1% Shell Material:PC +ABS (Fireproof) Installation Box: 86* 86mm Square or European 60mm Round Box Wire Terminals:Wire 2 x 1.5 mm2 or 1 x 2.5 mm2 Protection Class: IP20 Buttons: Knob