The T6861 is a digital thermostat designed for fan coil unit control in commercial and residential buildings. It provides 2-pipe and 4-pipe control with 3-speed fan control for accurate room temperature regulation. Key features: Power supply 110VAC or 220VAC. 2-pipe system: cool only, heat only or manual changeover. 4-pipe system: manual or automatic changeover. 3-speed fan control: Low / Medium / High, manual or automatic. Ventilation mode with the fan running and the valve off. Blue or green backlight on a large LCD display. Direct installation on a standard 86-size box. Remote temperature sensor, keycard energy saving and time on and off settings. RS485 / ModBus communication available. Applications: fan coil unit control in commercial and residential buildings. Model: T6861. 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.