Measurement Object: Wall-Mounted Boiler Opening Size: 86x86x13 (Front) and 27 (Rear) Mm Overall Dimensions: 86x86x13 (Front) and 27 (Rear) Mm (Mm) Control Type: Temperature Temperature Range: 5℃-60℃ Installation Type: Wall Opening Control Mode: Intelligent Temperature Control Regulator Temperature Measurement Error: 1℃ Working Voltage: AC 95-220V 50 or 60Hz Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Shipped without 3 AA batteries Colour:White Material:ABS Package Contents: 1 x Battery Tester Relay Analyzer 2 x 18650 Battery 1 x Charger Base 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. 2. Battery Powered, Requires 3AA Batteries, No Separate AC Power Supply Required, Easy To Install 4. Manual Mode or Program Mode or Temporary Program Mode 5. Programming Function, 5and2 or 6and1 or A Week, 6 Periods On Working Days, 2 Periods On Rest Days, Supports Different Temperature Settings And Runs As Planned. 3. App Remote Control, Smart Life or Tuya App Remote Control Anytime And Anywhere 1. Low Power Consumption Thermostat, Dedicated To Water And Gas Boilers Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.