Low Power Consumption Thermostat for Water and Gas Boilers Battery Powered, Requires 3AA Batteries (Not Included), No AC Power Supply Needed, Easy to Install Compatible with Smart Life/Tuya App for Remote Control Anytime and Anywhere Supports Manual Mode, Program Mode, and Temporary Program Mode Programmable Settings: 5+2, 6+1, or 7-Day Weekly Schedule with 6 Time Periods on Weekdays and 2 on Rest Days, Enables Different Temperature Settings According to Schedule Measurement Object: Wall-Mounted Boiler Opening Size: 86x86x13 mm (Front) + 27 mm (Rear) Overall Dimensions: 86x86x13 mm (Front) + 27 mm (Rear) Control Type: Temperature Control Temperature Range: 5C to 60C Installation Type: Wall Opening Control Mode: Intelligent Temperature Control Regulator Temperature Measurement Accuracy: 1C Working Voltage: AC 95-220V, 50/60Hz Note: Product appearance, color, and printed characters may vary slightly between batches, which does not affect functionality Shipped without 3 AA batteries Color: White Material: ABS Package Contents: 1 x Thermostat Note: Lighting effects and monitor settings may cause slight color differences between the image and actual item. Measurement error allowed is 1-3 cm.