The BT07-WF-FCU is a knob control smart thermostat with WiFi for central heating and cooling. It features a color display and touch screen LED display with a rotary knob for easy temperature adjustment. Key features: Power supply 24VAC, 110VAC or 220VAC, 50/60Hz. 5+2 weekly programmable schedule for comfort and economy. Temperature accuracy ±0.5°C. WiFi connectivity for remote control via Tuya Smart or Smart Life app, with Amazon Alexa and Google Assistant voice control. Supports 2-pipe and 4-pipe fan coil systems with on/off valve control and 0-10V modulating valve. Group control, smart scenes and data memory when power is off. Applications: central heating and cooling in office buildings, hospitals, hotels, shopping malls and homes. Model: BT07-WF-FCU. Minimum order quantity: 50 pieces. Port: Xiamen. Lead Time: 20-25 days. Payment terms: T/T. Price: Negotiable. The USD 25 price shown is a placeholder only, not the actual selling price.