The unit has a 5-1-1 programming system with six periods per day. Perfect for the house that applied radiant floor heating system. Features: Flexible programming: Program up to 6 periods per day. Same schedule at the weekday, then individual for Saturday and Sunday. Accurate Control: Keeps temperature within the level you set at the accuracy of 0.5. Great for the building that applied in-floor heating system. Conversion between Celsius() or Fehrenheit() is available. And all setting& 39;s languages sychronize with your time zone, local address and language. Suitable for installation within a standard 86mm hidden junction box and European 60mm round box. Easy to Install: No batteries required, and saves setting when un-powered. Note: *Please read the user manual carefully before use. *The schedule for this thermostat can be adjusted to 5-1-1 (Monday through Friday have the same schedule, then individual for Saturday and Sunday). *For the unit with no WiFi, App and voice control are not available. Specifications: Material: PC+ABS(fireproof) Color: Black / White (optional) Connection: With WiFi / No WiFi (optional) Sensor: NTC Accuracy: 0.5 Set Temp. : 5~35 Room Temp. : 5~99 Power Supply: 95-240V AC, 3A, 50~60Hz Power Consumptions: Packing List: 1 * Thermostat 2 * Screw 1 * User Manual 1 * External Sensor