WiFi knob controller; knob control, multiple scene display. Voice control; works with For , For Home, and For Yandex . Manual and programming modes; easily set weekly schedules on the mobile app. Separate schedules can be set for weekdays (Monday through Friday) and weekends (Saturday or Sunday), making it very user-friendly. Weekly programming mode; heat and cool mode schedules can be set 5+2, 6+1, or per week. Energy-saving, cost-effective, and environmentally friendly. Temperature calibration; displays the temperature range and adjusts the temperature calibration (9.9C to 9.9C). Specification:B:for Water Gas Boiler 3A Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Color: As Shown Material: plastic Package Contents: 1 x Smart Knob Thermostat Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.