54221Hi, stop your steps Descriptions:This thermostat controller used in commercial, industrial and civil buildings, heating, central air conditioning, air conditioning, coil motor, water control valve. So that the ambient temperature of the controlled place is constant within the set temperature range. Temperature setting: the dial indicator should be set to the desired constant temperature position. Application for sub-type air conditioner and other ways of temperature preheating controlApplication: air conditioner control for room temperature \Specifications:Temperature control range: 10-30 C accuracy: 1 C Operating voltage: 220V-50Hz/60Hz Load current: 6A(Max) Thermostat 2A , 220V AC 10%, 50Hz/60Hz Three speed switches 3A , 220V AC 10%, 50Hz/60Hz Size: 8x8x 3cm/3.15x3.15x1.18" Quantity: 1 PcNote: Please allow 1-3mm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Contents:1 x Thermostat Controller2 x Screws1 x Installation Manual