Smart Home Screenless Knob Thermostat Only With External Sensors, Dual Color LED Indicator Features: 1. Strict temperature control accuracy (+- 1 degree Celsius), providing the warmth you want. 2. Ultra-thin embedded panel, visible thickness on the wall is only 12.4mm, perfectly fits all kinds of walls. 3. Compatible with standard 86mm square box and 60mm European box, meeting all installation environments. 4. Knob temperature adjustment, simple operation, smooth and delicate touch, giving you an excellent experience. 5. Two-color LED atmosphere light design, the use status is clear at a glance. Specifications: 1. Voltage range: 95-240V AC, 5060Hz or 24V DCAC, 5060Hz (Please check the laser printed information on the back of the thermostat for the actual voltage) 2. Current: 5A (water heating, waterboiler), 16A (electric heating) 3. Sensor: NTC3950, 10K 4. Accuracy: +-1 degree Celsius 5. Set temperature range: 0-35 degrees Celsius 6. Ambient temperature: 0-45 degrees Celsius 7. Ambient humidity: 5-95% RH (non-condensing) 8. Storage temperature: -5 to 45 degrees Celsius 9. Power consumption: less than 1.5W 10. Time error: less than 1% 11. Housing material: PC + ABS (fireproof) 12. Mounting box: 86 x 86mm square or European 60mm round box 13. Wire terminals: 2 x 1.5 mm2 or 1 x 2.5 mm2 14. Protection level: IP20 15. Button: Rotary knob