1823 black 23S WiFi thermostat is a 3A intelligent temperature controller specially designed for water floor heating and hot water circulation systems. Built-in WiFi module enables remote control via mobile APP, allowing users to adjust temperature, set timing schedules and check working status remotely. Equipped with high-precision NTC sensor, it maintains stable constant indoor temperature automatically. The sleek matte black panel matches various interior decoration styles, with clear digital display and sensitive touch keys supporting child lock and anti-freeze protection. Rated 3A load steadily drives heating actuators, while built-in overheat and sensor error alarms improve safety. Standard 86-type wall-mounted structure enables quick installation, and anti-interference circuit guarantees long continuous operation. Suitable for villas, apartments and hotels pursuing smart home control. Featuring stable performance and favorable factory wholesale price, it is a premium smart heating accessory for global heating equipment distributors.