Feature: In the default heating mode, press the HEAT/COOL button for 2 minutes to switch to the cooling mode. When CU (current temperature) rises to the same as TA (targe-t temperature), the working state will change from ON to OFF. If the temperature is too high, correct the temperature of the thermostatic socket. Use the -/+ button to set the CU temperature, ranging from 5C to -5C, and the default is 0. The button design is simple and beautiful. Using PC fireproof material, the alloy plug has strong conductivity and will not rust. The battery compartment is designed for easy removal of the battery. Instructions: Temperature sensor: detect CU (current temperature) LC-D: Heating mode (flame symbol) Cooling mode (snowflake symbol) LC-D: CU current temperature (room temperature) LC-D: / temperature unit (press and hold at the same for time (+ and-buttons can be switched for 2 seconds) ON/OFF button: Turn heating/cooling mode on or off In the closed state, the CU (current) room temperature is displayed HEAT/COOL button: Switch between heating/cooling modes RESER button It works like reloading the battery Child lock button Press for 2 seconds to activate, the L- symbol is displayed in the lower left corner of the LCE -/+ button Adjust TA (targ-et temperature) During the setting process, adjust the setting value, you can press and hold to fast forward or rewind SET button If necessary, calibrate the C-D (current) temperature Range: -5~5, the default is 0 Set hysteresis temperature (range 1-5, default is 1) Socket: please do not exceed the maximum load Battery compartment (load 2 LR44 button batteries, delivery does not contain electromagnetic) Specification: Color: White Material: Plastic PULG: US,EU,EN Size: 13.8x6.1x5.6cm(5.4x2.4x2.2Inch) Quantity: 1Pc Note: And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x switch