The BT02B-FCU is a smart FCU thermostat with WiFi and Modbus RS485 for fan coil unit systems. It supports 2-pipe on/off valve, 4-pipe on/off valve and 2-pipe 0-10V modulating valve control with 3-speed fan control. Key features: Power supply 24VAC/110VAC/220VAC, 50/60Hz. Temperature accuracy �±0.5�°C. Set temperature range 5-35�°C. Display temperature range 5-99�°C. Ambient humidity 5-95%RH. Sensor NTC3950, 10K. Power consumption less than 1.5W. Voice control via Amazon Alexa and Google Assistant. Tuya Smart and Smart Life app control. Keycard and window card energy saving functions. Available in black and white. Applications: fan coil unit control in hotels, offices, commercial and residential buildings. Model: BT02B-FCU. Minimum order quantity: 50 pieces. Port: Xiamen. Lead Time: 20-25 days. Payment terms: T/T. Price: Negotiable. USD 25 price shown is a placeholder only, not the actual selling price.